Journal of Yeungnam Medical Science

Original article

Neurology
Characteristics of mDIXON-Quant and proton magnetic resonance spectroscopy imaging of thigh skeletal muscles in patients with stroke-related sarcopenia: a prospective case-control study: Ruihong Yao, Bu-Lang Gao, Jihong Hu, Wei Zhao, Yang Tian, Liqing Yao, Yongneng Jiang; J Yeungnam Med Sci. 2025;42:49. Published online August 28, 2025; DOI: https://doi.org/10.12701/jyms.2025.42.49

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Abstract PDF: Background
This study was performed to investigate the imaging features of mDIXON-Quant sequence (Philips Healthcare) and proton magnetic resonance spectroscopy (1H-MRS) of thigh muscles in patients with stroke-related sarcopenia (SRS).
Methods
This prospective case-control study was conducted in 40 patients with SRS, 40 patients without sarcopenia who had a stroke, and 40 healthy volunteers using mDIXON-Quant and 1H-MRS scanning. Skeletal muscle cross-sectional area (CSA) and fat fraction (FF) were analyzed.
Results
The skeletal muscle FF value was significantly higher (p<0.05) in patients with SRS and on the affected side. The extracellular fat content of the rectus femoris muscle in normal controls was 4× to 10× the intracellular fat content. A significant increase (p<0.05) in intra- and extracellular fat content was detected in the SRS group. The degree of fat content increase in the SRS group was significantly lower (p<0.05) for extracellular fat than intracellular fat, with a ratio of extracellular to intracellular fat content of <4. The intracellular fat content was significantly higher (p<0.05) in the SRS group. A moderate-to-strong positive correlation existed between intracellular fat content (area 1) and muscle fat percentage. The degree of decrease in CSA in the posterior muscle group was significantly greater (p<0.05).
Conclusion
Thigh muscle CSA significantly decreased in SRS, while FF increased. The intra- and extracellular fat content of the skeletal muscle was significantly increased, especially the intracellular fat content. SRS was confirmed when the ratio of extracellular fat content to intracellular fat content was <4.

Review article

Physical therapy, Sports Therapy, and Rehabilitation
Ultrasound imaging and guidance in the management of myofascial pain syndrome: a narrative review: Wei-Ting Wu, Ke-Vin Chang, Vincenzo Ricci, Levent Özçakar; J Yeungnam Med Sci. 2024;41(3):179-187. Published online June 17, 2024; DOI: https://doi.org/10.12701/jyms.2024.00416

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Myofascial pain syndrome (MPS) is a common musculoskeletal disorder characterized by muscle pain, tenderness, and trigger points. Ultrasonography has emerged as a key tool for diagnosing and treating MPS owing to its ability to provide precise, minimally invasive guidance. This review discusses the use of ultrasonography in various approaches to evaluate and manage MPS. Studies have shown that shear-wave sonoelastography can effectively assess muscle elasticity and offer insights into trapezius stiffness in patients with MPS. Ultrasound-guided interfascial hydrodissection, especially with visual feedback, has demonstrated effectiveness in treating trapezius MPS. Similarly, ultrasound-guided rhomboid interfascial plane blocks and perimysium dissection for posterior shoulder MPS have significantly reduced pain and improved quality of life. The combination of extracorporeal shockwave therapy with ultrasound-guided lidocaine injections has been particularly successful in reducing pain and stiffness in trapezius MPS. Research regarding various guided injections, including dry needling, interfascial plane blocks, and fascial hydrodissection, emphasizes the importance of ultrasonography for accuracy and safety. Additionally, ultrasound-guided delivery of local anesthetics and steroids to the quadratus lumborum muscle has shown lasting pain relief over a 6-month period. Overall, these findings highlight the pivotal role of ultrasonography in the assessment and treatment of MPS.

Citations

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The Comparative Efficacy of Treatments for Cervicogenic Headache: A Systematic Review and Network Meta‐Analysis of Randomised Controlled Trials
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European Journal of Pain.2026;[Epub] CrossRef
Myofascial pain in older adults: a geroscience-informed framework integrating precision geriatrics and digital therapeutics
Chang Zhu, Jie Xu, Yating Gong, Chaoyu Wang, Wenting Xu, Lijun Chen
Frontiers in Aging Neuroscience.2026;[Epub] CrossRef
Blood Flow of the Infraspinatus Muscle in Individuals With and Without Shoulder Pain and Myofascial Trigger Points
Jace Brown, Gary Kearns, Emily Hedges, Samantha Samaniego, Sharon Wang‐Price
Journal of Ultrasound in Medicine.2025; 44(1): 127. CrossRef
Ultrasound-Guided vs Non-Guided Pharmacopuncture for Cervical Myofascial Pain Syndrome: A Multi-Center Prospective Comparative Study Protocol
Kwangho Kim, Juhwan Song, Hongmin Chu, Robin Kwon, Seongjun Park, Junhui Kwon, Hyeon Joon Hong, Youngyun Lee, Sanghyuk Kwon, Kyungho Kang, Jungtae Leem, Cheol-Hyun Kim
Journal of Pain Research.2025; Volume 18: 1417. CrossRef
Integrating Ultrasound-Guided Injections and Peripheral Magnetic Stimulation in Chronic Myofascial/Lumbar Pain
Wei-Ting Wu, Ke-Vin Chang, Kamal Mezian, Vincenzo Ricci, Levent Özçakar
Life.2025; 15(4): 563. CrossRef
Ultrasound-guided 10% dextrose interfascial hydrodissection for patients with myofascial pain syndrome: A retrospective observational study
Tao Wu, Bao Ru, Haixin Song, Zhiping Liao, Xiaotian Yang, Fangchao Wu, Jianhua Li
Medicine.2025; 104(25): e42587. CrossRef
Importance of Myofascial Pain Syndrome of the Psoas Major Muscle and Ultrasound-Guided Treatment Algorithm
Aylin Ayyıldız, Burak Tayyip Dede, Mustafa Hüseyin Temel, Bülent Alyanak, Mustafa Turgut Yıldızgören, Fatih Bağcıer
Clinical Medicine Insights: Arthritis and Musculoskeletal Disorders.2025;[Epub] CrossRef
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Dies Izah Qonita, Aryadi Arsyad, Andi Ariyandy, Meutiah M. Abdullah, Andi R. A. Hasyar
Bulletin of Rehabilitation Medicine.2025; 24(4): 44. CrossRef
Pneumothorax After Dry Needling of Intrascapular Muscles Using a Rib Bracketing Technique: Insights From the Clinician, Patient, and Clinical Expert
Paul E Mintken, Blair Denman, Jan Dommerholt
Physical Therapy.2025;[Epub] CrossRef
Anatomy of the deltoid muscle trigger points
Leonardo Henrique Alves Rocha, Lucas Hara, Larissa Barbosa Lima, Ana Itezerote, Flávio Hojaij, Mauro Andrade, Alfredo Jacomo, Flavia Akamatsu
Clinics.2025; 80: 100795. CrossRef
Ultrasound elastography to guide compression therapy for gastrocnemius trigger points in runners
Ingrid C. Landfald, Michał Podgórski, Łukasz Olewnik
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Integrating Ultrasound-Guided Multifidus Injections with Repeated Peripheral Magnetic Stimulation for Low Back Pain: A Feasibility Study
Wei-Ting Wu, Ke-Vin Chang, Levent Özçakar
Journal of Pain Research.2024; Volume 17: 2873. CrossRef
Ultrasound-guided fascial plane blocks in chronic pain: a narrative review
Francesco Marrone, Carmine Pullano, Alessandro De Cassai, Pierfrancesco Fusco
Journal of Anesthesia, Analgesia and Critical Care.2024;[Epub] CrossRef

Original article

Gastroenterology and Hepatology
Association between total body muscle percentage and prevalence of non-alcoholic fatty liver disease in Korean adults findings from an 18-year follow-up: a prospective cohort study: Byoung Chan Ahn, Chul Yong Park, Jung Hee Hong, Ki Ook Baek; J Yeungnam Med Sci. 2023;40(Suppl):S47-S55. Published online August 29, 2023; DOI: https://doi.org/10.12701/jyms.2023.00605

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Abstract PDF Supplementary Material: Background
This study aimed to elucidate the association between total lean muscle mass and the incidence of non-alcoholic fatty liver disease (NAFLD) in the adult Korean population.
Methods
Utilizing data derived from the 18-year prospective cohort of the Korean Genome and Epidemiology Study, NAFLD was diagnosed via the hepatic steatosis index with an established cutoff value of 36. Lean muscle mass was assessed via bioelectrical impedance analysis and subsequently divided into tertiles. A generalized mixed model with a logit link was employed for repeated measures data analysis, accounting for potential confounders.
Results
Analysis encompassed 7,794 participants yielding 49,177 measurements. The findings revealed a markedly increased incidence of NAFLD in the lower tertiles of muscle mass, specifically, tertile 1 (odds ratio [OR], 20.65; 95% confidence interval [CI], 9.66–44.11) and tertile 2 (OR, 4.57; 95% CI, 2.11–9.91), in comparison to tertile 3. Age-dependent decreases in the OR were observed within the tertile 1 group, with ORs of 10.12 at age of 40 years and 4.96 at age of 80 years. Moreover, each 1%-point increment in total muscle mass corresponded with an estimated OR of 0.87 (95% CI, 0.82–0.93) for NAFLD resolution.
Conclusions
The study demonstrates a significant association between total muscle mass and NAFLD prevalence among Korean adults. Given the potential endocrine role of muscle mass in NAFLD pathogenesis, interventions aimed at enhancing muscle mass might serve as an effective public health strategy for mitigating NAFLD prevalence.

Case reports

Musculoskeletal Disorders
Ultrasonographic and magnetic resonance images of a gluteus maximus tear: Jong Bum Kim, Wonho Lee, Min Cheol Chang; Yeungnam Univ J Med. 2021;38(2):157-159. Published online July 31, 2020; DOI: https://doi.org/10.12701/yujm.2020.00500

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Abstract PDF

The diagnosis of a gluteal muscle tear or strain is based on clinical findings. However, for an accurate diagnosis, imaging examinations are also needed. Herein, we describe the case of a patient with a gluteus maximus muscle tear confirmed by ultrasonography (US) and magnetic resonance imaging (MRI). A 58-year-old woman complained of dull pain in the left lateral gluteal region that she had been experiencing for 8 days. In the axial US image, retraction of the left gluteus maximus muscle was noted around its insertion site in the iliotibial band. On an MRI, a partial tear in the left gluteus maximus was observed at its insertion site in the left iliotibial band. In addition, fluid infiltration due to edema and hemorrhage was observed. A partial left gluteal muscle tear was diagnosed. The patient was treated with physical therapy at the involved region and oral analgesics. She reported relief from the pain after 1 month of treatment. Based on this experience, we recommend US or MRI for accurate diagnosis of muscle tear or strain.

Citations

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Gluteus Maximus Tears: Ultrasonography Imaging Features on a Series of Five Patients With Literature Review
Shashank Chapala, Ankit B. Shah, Bipin R. Shah, Kapil Shirodkar, Karthikeyan P. Iyengar, Rajesh Botchu
Sonography.2025; 12(3): 394. CrossRef
Gluteus Maximus Distal Myotendinous Junction Tear in a Pickleball Player: A Case Report
Shanterian King, Adam Johnson, Elena Jelsing
Current Sports Medicine Reports.2024; 23(6): 213. CrossRef
Essentials of thoracic outlet syndrome: A narrative review
Min Cheol Chang, Du Hwan Kim
World Journal of Clinical Cases.2021; 9(21): 5804. CrossRef
Obturator hernia - a rare etiology of lateral thigh pain: A case report
Jun Young Kim, Min Cheol Chang
World Journal of Clinical Cases.2021; 9(34): 10728. CrossRef

Thoracic and Cardiovascular Surgery
Rectus abdominis muscle atrophy after thoracotomy: Jang Hoon Lee, Seok Soo Lee; Yeungnam Univ J Med. 2020;37(2):133-135. Published online November 27, 2019; DOI: https://doi.org/10.12701/yujm.2019.00381

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Abstract PDF

Intercostal nerve injury is known to occur during thoracotomy; however, rectus abdominis muscle atrophy has rarely been reported. We describe a 52-year-old man who underwent primary closure of esophageal perforation and lung decortication via left thoracotomy. He was discharged 40 days postoperatively without any complications. He noticed an abdominal bulge 2 months later, and computed tomography revealed left rectus abdominis muscle atrophy. We report thoracotomy induced denervation causing rectus abdominis muscle atrophy.

Citations

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Intercostal nerve injury after rib fractures: A case series correlating electrodiagnostic testing with imaging, ultrasound, and surgical findings
Matthew Sherrier, Dane Daley, Evert Eriksson
PM&R.2026;[Epub] CrossRef
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Donna Napier
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Rectus Abdominis Muscle Atrophy and Asymmetry After Pulmonary Lobectomy
Aidan S. Weitzner, Myan Bhoopalam, Jeffrey Khong, Arushi Biswas, Allison Karwoski, Meron Haile, Natalie Waldron, Resham Mawalkar, Anjana Srikumar, Stephen Broderick, Jinny Ha, Kristen P. Broderick
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Intercostal nerve electrodiagnostic testing in rib fractures
Kristen Gambardella, Cody Ashy, Dane Daley, Evert Eriksson, Matthew Sherrier
Muscle & Nerve.2024;[Epub] CrossRef
Ingenuity of minimally invasive thoracoscopic lobectomy for undiagnosed pulmonary tumour
Sumitaka Yamanaka, Takashi Yoshimatsu, Takeaki Miyata, Hanae Higa
Respirology Case Reports.2020;[Epub] CrossRef

Original Article

Endocrinology, Diabetes, and Metabolism
The effect of thalidomide on visceral fat pad mass and triglyceride concentration of the skeletal muscles in rats: Ki-Hoon Kim, Chang-Bon Choi, Jong-Yeon Kim; Yeungnam Univ J Med. 2018;35(2):213-218. Published online December 31, 2018; DOI: https://doi.org/10.12701/yujm.2018.35.2.213

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Abstract PDF

Background
Body fats, especially both of abdominal fat pad mass and skeletal muscle fat content, are inversely related to insulin action. Therefore, methods for decreasing visceral fat mass and muscle triglyceride content may be helpful for the prevention of insulin resistance.
Methods
Thalidomide, used for its anti-angiogenic and anti-inflammatory properties, was administered to rats for 4 weeks. A 10% solution of thalidomide in dimethyl sulfoxide was injected daily into the peritoneal cavity as much as 100 mg/kg of body weight.
Results
The total visceral fat pad mass in the thalidomide-treated group was 11% lower than in the control group. The size of adipocytes of the epididymal fat pad mass in the thalidomide-treated group was smaller than in the control group. The intraperitoneal thalidomide treatment increased triglyceride concentrations by 16% in the red muscle, but not in the white muscle.
Conclusion
The results suggested that intraperitoneal thalidomide treatment inhibited abdominal fat accumulation, and that the free fatty acids in the blood were preferentially accumulated in the red muscle rather than in the white muscle.

Citations

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Thalidomide suppresses migration and invasion of colorectal cancer cells by inhibiting HOXB7‐mediated activation of the Wnt/β‐catenin signaling pathway
Liyang Liu, Wusong Xue
Chemical Biology & Drug Design.2024;[Epub] CrossRef

Case Reports

Ophthalmology
Suddenly fixed upward ocular deviation under general anesthesia: Won Jae Kim, Sang Jin Park, Myung Mi Kim; Yeungnam Univ J Med. 2017;34(2):290-292. Published online December 31, 2017; DOI: https://doi.org/10.12701/yujm.2017.34.2.290

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Abstract PDF: Various changes in ocular position are possible during general anesthesia as opposed to the awakening state. However, unexpected ocular deviation under general anesthesia is a disconcerting event as it can lead to difficult complications intraoperatively. To date, sudden fixed upward ocular deviation has been rarely reported previously. This phenomenon was observed in an 8-year-old boy during strabismus surgery. Suddenly fixed upward ocular deviation occurred when the speculum was inserted into the right eye. When the eyeball was pulled down, using forceps, there was some resistance, such as contracture of superior rectus. The eyeball sprang back into the upward position when the forceps was released. These changes could hamper the good exposition of the surgical field, leading to significant intraoperative difficulties and complications. Surgeons should be aware of this possibility, despite general anesthesia; if it occurs, proceed with the surgery as planned preoperatively, and both ophthalmic and anesthetic interventions should be used to solve this problem.

Nephrology
Spontaneous abdominal intramuscular hematoma in a non-dialysis chronic kidney disease patient under cilostazol therapy.: Seonghui Kang, Hyung Min Yu, Ha Young Na, Young Kyung Ko, Se Woong Kwon, Chae Ho Lim, Sun Woong Kim, Young Il Jo; Yeungnam Univ J Med. 2014;31(2):139-143. Published online December 31, 2014; DOI: https://doi.org/10.12701/yujm.2014.31.2.139

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Abstract PDF: Spontaneous intramuscular hematoma of the abdominal wall is a rare condition characterized by acute abdominal pain. It is often misdiagnosed as a surgical condition. It used to be associated with risk factors such as coughing, pregnancy, and anticoagulant therapy. Most cases of abdominal wall hematomas were rectus sheath hematomas caused by the rupture of either the superior or inferior epigastric artery, but spontaneous internal oblique hematoma was extremely rare. In this report, we present a case of spontaneous internal oblique hematoma in a 69-year-old man with non-dialysis chronic kidney disease who was taking cilostazol. The patient complained of abrupt abdominal pain with a painful palpable lateral abdominal mass while sleeping. The abdominal computed tomography showed an 8 cm-sized mass in the patient's left internal oblique muscle. The administration of cilostazol was immediately stopped, and the intramuscular hematoma of the lateral oblique muscle disappeared with conservative management.

Review Articles

Plastic and Reconstructive Surgery
Various Abdominal Flaps for Breast Reconstruction: Pedicled TRAM, Free TRAM, Muscle-sparing TRAM, DIEP, and SIEA Flaps.: Jun Ho Lee; Yeungnam Univ J Med. 2011;28(2):116-123. Published online December 31, 2011; DOI: https://doi.org/10.12701/yujm.2011.28.2.116

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Abstract PDF: The incidence of breast cancer, the second most prevalent cancer type in South Korea, has increased by 6.8% annually in the lastsix years.The higher number of breast cancer patients has led to an increase in the cases of skin-sparing mastectomies, thereby increasing the need for reconstructive procedures. The reconstruction options include alloplastic techniques such as implant or autologous reconstruction with numerous flaps. The abdominal area is the preferred donorsite for the harvest of autologous tissue for breast reconstruction. Breast reconstruction using abdonimal tissue is commonly accomplished using the transverse rectus abdominis myocutaneous (TRAM) flap. The establishment of microvascular surgery led to the development of the free TRAM flap because of its increased vascularity and decreased rectus abdominis sacrifice. The muscle-sparing TRAM, DIEP, and SIEA flap techniques were later developed in an effort to decrease the abdominal-donor-site morbidity by decreasing the injury to the rectus abdominis muscle and fascia. This article summarizes the various abdominal flaps for breast reconstruction.

Anatomy
In Vitro Culture of Endothelial Cell and Smooth Muscle Cell for Studying Vascular Diseases.: Joo Young Kim; Yeungnam Univ J Med. 2010;27(2):91-97. Published online December 31, 2010; DOI: https://doi.org/10.12701/yujm.2010.27.2.91

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Abstract PDF: Endothelial cells play a key role in pathological processes such as cancer cell metastasis, atherosclerosis, and diabetic retinopathy. Vascular smooth muscle cells directly involve in the formation of atheroma in atherosclerosis. Some kinds of the endothelial cells are simply harvested from the umbilical veins, the tunica intima of aortic walls, the retina using various enzymes solutions. Those purely isolated cells provide a powerful tool in vitro studies of the endothelial cell related diseases. In this context, the cultured smooth muscle cells after the isolation from the tunica media of aortic walls are also used for elucidating the pathogenesis of atherosclerosis. Here, I briefly introduce articles that include the isolation of human umbilical vein endothelial cells (HUVEC), aortic endothelial and smooth muscle cells, retinal microvascular endothelial cells (RMEC), as well as the diseases' applications of these cells.

Case Report

Otorhinolaryngology
Injury of the Medial Rectus Muscle by Using a Microdebrider During Endoscopic Sinus Surgery : A Case Report.: Yoon Seok Choi, Chang Hoon Bai, Si Youn Song, Yong Dae Kim; Yeungnam Univ J Med. 2006;23(2):240-246. Published online December 31, 2006; DOI: https://doi.org/10.12701/yujm.2006.23.2.240

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Abstract PDF: A microdebrider is increasingly used in endoscopic sinus surgery. Although it has many advantages over conventional instruments, it has been associated with severe complications. We treated a case of rupture of the left medial rectus muscle after use of a microdebrider during endoscopic sinus surgery in a 50 year-old female patient who complained of binocular diplopia and exotropia. The patient showed marked limitation on adduction and about 40 prism diopters of left exodeviation. The orbital computed tomography showed a bony defect at the left medial orbital wall, and injury of the medial rectus muscle. The exodeviation was corrected after ophthalmologic surgery. We report a case of the rupture of the medial rectus muscle after use of a microdebrider during endoscopic sinus surgery and review the medical literature.

Original Articles

Anatomy
Isolation of Endothelial Cells and Smooth Muscle Cells from Rat Aort.: Young Eun Yun, In Hwan Song, Eon Ki Sung, Joo Young Kim; Yeungnam Univ J Med. 2006;23(2):182-192. Published online December 31, 2006; DOI: https://doi.org/10.12701/yujm.2006.23.2.182

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Abstract PDF: BACKGROUND
Atherosclerosis has emerged as the leading cause of death in developed countries. At present, human umbilical vein endothelial cells (HUVEC) are most commonly used for the investigation of Endothelial cells (EC). However, HUVEC are not found in arteries but only in veins. Currently there are many reports on methods used to isolate EC;, most of these methods require special equipment to remove contaminating smooth muscle cells (SMC). MATERIALS AND METHODS: The method described here may be used to isolate not only ECs but also SMCs;,the approach presented here did not require special equipment. Rat aorta was treated with 2 mg/ml of type II collagenase solution for 45 minutes. The isolated cells from the aorta were incubated in medium G for a week;, only ECs could be separated. After the collagenase treatment, the rest of aorta was cut lengthwise, and left undisturbed to obtain SMCs in the culture dish for 10 days. To verify the purity of the isolated cells, we performed immunofluorescence and evaluated the results with transmission electron microscopy analysis. RESULTS: The immunofluorescence study demonstrated specific expression of CD31 and alpha-smooth muscle actin in the isolated ECs and SMCs, respectively. Cultured ECs and SMCs showed their own fine structure characteristics. CONCLUSION: These results suggest that this method for isolating ECs and SMCs may be especially useful for the study of atherosclerosis.

Social and Family Medicine
The Relationship Between Body Composition and Bone Mineral Density in Postmenopausal Women.: Jin Wook Chae, Il Hoe Kim, Woo Sung Kwon, Keun Mi Lee, Seung Pil Jung, Yong Moon; Yeungnam Univ J Med. 2003;20(1):53-61. Published online June 30, 2003; DOI: https://doi.org/10.12701/yujm.2003.20.1.53

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Abstract PDF

BACKGROUND
Body weight is an important factor that influence the bone density in postmenopausal women except estrogen dificiency. However, different results are reported about the relationship between body composition and bone density in the postmenopausal women. We have studied the relationship between age, body weight, body mass index (BMI), waist hip ratio (WHR), muscle mass, fat mass, fat free mass and bone density. MATERIALS AND METHODS: We have studied 127 persons of postmenopausal women who visited university medical center and examined the inbody 3.0 and Dual Energy X-ray Absorptiometry (DEXA) from Jan, 2001 to Jun, 2002. they didn't have any disease and didn't received hormone therapy, osteoporosis therapy or other medication that influence the bone density. RESULTS: The numbers of study subjects is total 127 persons. Mean age is 56.9+/-5.14, mean weight is 59.3+/-8.7 kg, mean BMI is 25.37+/-3.16 (kg/m2), mean fat mass is 20.02+/-5.05 kg, mean muscle mass is 37.49+/-4.50 kg, mean fat free mass is 39.80+/-4.70, mean BMD is 0.828+/-0.148 (g/cm2). In the result of linear regression analysis, age, height, weight, muscle mass, fat free mass, fat mass, BMI are significant determinants of BMD. In stepwise multiple regression analysis, age is the most significant determinant of BMD and besides age, fat free mass is the most significant determinant of BMD among body composition. CONCLUSION: In postmenopausal women, age, height, weight, BMI, muscle mass, fat free mass, fat mass are significant determinants of BMD and besides age, fat free mass is the most significant determinant of BMD among the body composition. So, diet and exercise that increase fat free mass will contribute to bone density increment.

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Problems with Bone Health and the Influencing Factors of Bone Mineral Density in Women across the Life Cycle
Nami Chun, Hyunju Chae
Korean Journal of Women Health Nursing.2015; 21(1): 43. CrossRef
Association between bone mineral density and remaining teeth in postmenopausal women
Kyeong-Soo Lee, Chang-Suk Kim
Journal of Korean society of Dental Hygiene.2014; 14(3): 319. CrossRef
Association of Anthropometric and Biochemical Factors with Bone Mineral Density in Korean Adult Women Data from the Fourth (2008~2009) and Fifth (2010~2011) Korea National Health and Nutrition Examination Surveys (KNHANES IV & V)
Soon-Nam Choi, Kwang-Hyun Jho, Nam-Yong Chung
Journal of the Korean Dietetic Association.2014; 20(3): 157. CrossRef
A Study of Factors Influencing the Bone Mineral Density on Premenopausal Women: Using the 2011 Korean National Health and Nutrition Examination Survey Data
Young-Mi Chun, Sun-Hee Lee
Journal of the Korea Academia-Industrial cooperation Society.2013; 14(12): 6246. CrossRef
Factors Associated with Bone Mineral Density in Korean Postmenopausal Women Aged 50 Years and Above: Using 2008-2010 Korean National Health and Nutrition Examination Survey
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Korean Journal of Community Nutrition.2013; 18(2): 177. CrossRef

Neurology
Diagnostic Sensitivity of Several Muscles in Repetitive Nerve Stimulation Test for Myasthenia Gravis.: Hyun Jic Kim, Sung Hwan Lim, Seung Yeop Lee, Jung Sang Hah, Wook Nyeon Kim; Yeungnam Univ J Med. 2001;18(2):277-286. Published online December 31, 2001; DOI: https://doi.org/10.12701/yujm.2001.18.2.277

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Abstract PDF: BACKGROUND
This study was undertaken to evaluate the diagnostic sensitivity of several muscles in repetitive nerve stimulation test (RNST) for myasthenia gravis (MG) patients. MATERIALS AND METHODS: The study population consisted of 39 MG patients classified by modified Ossermann's classification. Using Stalberg's method, RNST was systematically performed in facial (orbicularis oculi and nasalis) and upper extremity (flexor carpi ulnaris, abductor digiti quinti and anconeus) muscles. RESULTS: The significant electrodecremental response of RNST were noted in orbicularis oculi (58.9%), nasalis (51.3%), flexor carpi ulnaris (42%), anconeus (41%) and abductor digiti quinti muscles (27%). Among the 3 muscles of upper extremity (abductor digiti quinti, flexor carpi ulnaris and anconeus), the positive electrodecremental response of anconeus muscles was significantly higher than other two muscles (p<0.05) in type IIa, IIb and there were no statistical differences of the positive electrodecremental response between orbicularis oculi and nasalis muscles. The facial muscles showed more prominent decremental responses than upper extremity muscles in type I MG(p<0.05). In type IIa MG patients, there were no significant statistical differences between facial and upper extremity muscles but significant statistical differences among upper extremity muscles. In type IIb MG patients, there were no significant statistical differences in all tested muscles in spite of the increased positive electrodecremental response of RNST. CONCLUSION: On the basis of this study, RNST would be initially performed for the orbicularis or nasalis in type I MG and for the anconeus in type IIa or IIb MG.

Physiology
Effect of Age on Glucose Metabolism of Skeletal Muscle in Rats.: Eung Chan Jang, Woon Ki Youn, Suck Kang Lee; Yeungnam Univ J Med. 2001;18(1):94-100. Published online June 30, 2001; DOI: https://doi.org/10.12701/yujm.2001.18.1.94

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Abstract PDF

BACKGROUND
It is doubtful that aging causes deteriorated glucose metabolism and insulin resistance of skeletal muscle. Some researchers had different results about it. So we have studied the mechanism responsible for the abnormal glucose tolerance associated with aging in rapidly growing and matured rats. MATERIALS AND METHODS: Animals were used S.D. rats. Growing rats were 7 weeks old (BW: 160-190 gm) and matured rats were 28 weeks old (BW: 420-525 gm). RESULTS: Fasting blood glucose and plasma insulin levels were significantly elevated in matured rat compared with growing rats. And during oral glucose tolerance test the glucose level was also significantly elevated in matured rats. These results confirmed an insulin resistant state of aging. Insulin levels at 30 minutes of oral glucose tolerance test was significantly elevated in growing rat. But at 120 minutes it was maintained at higher level in matured rats than in growing rats. It suggested the possibility of increased insulin secretion by initial stimulation of beta-cells in growing rats, and increased secretion and decreased catabolic rate of insulin in matured rats. Glucose uptake rate of soleus muscle in matured rats was lower than that of growing rats, but the difference was not statistically significant. The dose(insulin)- responsive (glucose uptake) curve of soleus muscle was only slightly deviated to the right side. CONCLUSION: Glucose metabolism of rat skeletal muscle was worsened by aging. The data of glucose uptake experiments suggested the possibility of insulin resistance of skeletal muscle in matured rats, but the mechanism of insulin resistance of skeletal muscle need further studies.

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Journal of Sasang Constitutional Medicine.2013; 25(3): 218. CrossRef

Endocrinology, Diabetes, and Metabolism
The Effects of Hyperglycemia and Hyperlipidemia on Muscle Glycogen Utilization during Exercise in rats.: Jong Chul Ahn, Dong Woo Lee, Oog Jin Shon, Seuk Kang Lee; Yeungnam Univ J Med. 1999;16(1):34-42. Published online June 30, 1999; DOI: https://doi.org/10.12701/yujm.1999.16.1.34

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Abstract PDF: The effects of hyperglycemia and hyperlipidemia on utilization of muscle glycogen during 45 minutes treadmill running(26 m/min, 8 % grade) were evaluated in Sprague Dawley rats, and the charateristic of the 4 different type of muscles, soleus, white and red gastrocnemius, and plantaris, on glycogen utilization were simultameously investigated. Hyperglycemia, 145-165 mg/dL, was induced by oral glucose ingestion, and hyperlipidemia, 444 uEq/L, was induced by combined treatment of intraperitoneal heparine injection and oral 10 % intralipose ingestion. During the hyperglycemic trial, the glycogen utilization of plantaris muscle was decreased by 13 % at 45 minutes duration of treadmill running comparing to the control trial(p<0.05), and the glycogen utilization of white gastrocnemius was also decreased. The sparing tendency of soleus and red gastrocnemius by 5-13 % was observed at 30 and 45 minutes of treadmill running in hyperglycemic trial. There was no glycogen sparing effect of hyperlipidemia in the soleus, red gastrocnemius and plantaris muscle subjected in this experiment during exercise. However, only a slight sparing tendency of white gastrocnemius muscle was observed. In summary, the glycogen sparing effect of hyperglycemia during exercise was observed in plantaris and white gastrocnemius muscles in rats. However, there was no glycogen sparing effect of hyperlipidemia in the 4 hindlimb muscles. It was observed that the glycogen sparing effect of hyperglycemia is more prominant in fast glycolytic muscle fiber.

Physiology
Effect of Hyperglycemia and Hyperlipidemia on Cardiac Muscle Glycogen Usage during Exercise in Rats.: Suck Kang Lee, Eun Jung Kim, Yong Woon Kim; Yeungnam Univ J Med. 1998;15(1):29-35. Published online June 30, 1998; DOI: https://doi.org/10.12701/yujm.1998.15.1.29

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Abstract PDF

Rats were studied during 45 minutes treadmill exercise to determine the effects of hyperglycemia and hyperlipidemia on the utilization of cardiac muscle glycogen, and the utilization of diaphragm muscle glycogen was also studied for comparing to cardiac muscle. The hyperglycemia was produced by ingestion of 25% glucose solution(1ml/100gm, BW) and the hyperlipidemia by 10% intralipose ingestion(1ml/100gm, BW) with intraperitoneal injection of heparin(500 IU) 15 minutes before treadmill exercise. The mean blood glucose concentrations(mg/dL) in control and hyperglycemic rats were 110 and 145, respectively, and the mean plasma free fatty acid concentrations(micronEq/L) in control, control exercise(control-E) and hyperlipidemia exercise(HL-E) rats were 247, 260 and 444, respectively. In the hyperglycemic trial, the cardiac muscle glycogen concentration was not significantly decreased by the exercise but the concentration in control rats was decreased to 73.9%(p<0.05). The glycogen concentration of diaphragm was significantly decreased in both groups by the exercise, but the hyperglycemia decreased the glycogen utilization by approximately 10% compared to the control. The cardiac muscle glycogen concentration was not decreased by the exercise in control and hyperlipidemic rats but the utilization of glycogen in hyperlipidemic rats is lower than that of the control. These data illustrate the sparing effect of hyperglycemia on cardiac muscle glycogen usage during exercise, but the effect of hyperlipidemia was not conclusive. In the skeletal muscle, the usage of glycogen by exercise was spared by both hyperglycemia and hyperlipidemia.

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The Effects of Treadmill Exercise on Blood components, Antioxidant enzymes and Reactive Oxygen in Hyperlipidemic Rats
Byeong-Ok Jung, Sang-Hun Jang, Hyun-Soo Bang
Journal of the Korean Society of Physical Medicine.2013; 8(1): 71. CrossRef

Pharmacology, Drug Therapy, and Toxicology
Existance of cholinergic and purinergic receptor on the detrusor muscle of rat urinary bladder.: Tae Su Choi, Oh Cheol Kwon, Jeoung Hee Ha, Kwang Youn Lee, Won Joon Kim; Yeungnam Univ J Med. 1991;8(2):138-149. Published online December 31, 1991; DOI: https://doi.org/10.12701/yujm.1991.8.2.138

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Abstract PDF: This study was aimed at investigation of the stimulatory innervations on the rat urinary bladder. Detrusor muscle strips of 15 mm long were suspended in isolated muscle chambers containing 1 ml of PSS maintained at 37℃ and aerated with 95% O²/5% Co². Isometric myography was performed, and the results were as followings: Muscle strips showed “on-contraction” by electric field stimulation (EFS) frequency-dependently. The EFS-induced contraction was not affected by hexamethonium, a ganglion blocker, but abolished by tetrodotoxin, a nerve conduction blocker. Physostigmine, a cholinesterase inhibitor enhanced the EFS-induced contraction which was inhibited by hemicholinium, an inhibitor of choline uptake at the cholinergic nerve ending. Such an EFS-induced contraction was antagonized by atropine only partially, and the atropine-resistant portion was completely abolished by the desensitization of purinergic receptors by prolonged incubating of the strips in the presence of high concentration of ATP. Bethanechol, a cholinergic agonist, elicited concentration-dependent contraction. Adenosine triphosphate (ATP), a purinergic agonist, induced a weak but concentration-dependent contraction of short duration. Bethanechol-induced contraction was not affected by ATP-desensitization, and ATP-induced contraction was not affected by tetrodotoxin. These results suggest that there are at least two main stimulatory components of innervations in the detrusor muscle, cholinergic muscarinic and purinergic; and those receptors are independent each other.

Pathology and Forensic Medicine
Effects of insulin and exercise on glucose uptake of skeletal muscle in diabetic rats.: Jin Hyun Park, Young Woon Kim, Jong Yeon Kim, Suck Kang Lee; Yeungnam Univ J Med. 1990;7(1):29-37. Published online June 30, 1990; DOI: https://doi.org/10.12701/yujm.1990.7.1.29

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Abstract PDF: The effects of insulin and exercise on glucose uptake of skeletal muscle were investigated in soleus muscle isolated from low dose streptozotocin induced diabetic rat in vitro. Glucose uptake was assessed by measuring ³H-methylglucose uptake in vitro. Basal glucose uptake in diabetes was reduced by approximately one-third of the control value (5.6±0.73µMol/g/20min. in diabetes versus 8.4±0.77 in control, P<0.01). There was also a significant decrease (P<0.01) in glucose uptake of diabetes at physiologic insulin concentration (200 µIU/ml) by 40% (6.1±1.20 versus 10.0±0.81). Furthermore, maximal insulin (20000 µIU/ml)-stimulated glucose uptake was 36% lower in diabetes as compared with control (7.3±1.29 versus 11.4±1.29, P<0.01). In contrast, exercise (1.0 km/hr, treadmill running for 45 min.) effect on glucose uptake was so dramatic in diabetes that glucose uptake at basal state was 8.+1.09 and insulin stimulated-glucose uptake were 10.2±1.47 and 11.9±1.64, in 200 and 20000 µIU/ml added insulin, respectively. These results suggest that insulin insensitivity develops in skeletal muscle after 2 weeks of streptozotocin-induced diabetes, but these insensitivity was recovered significantly by single session of running exercise.

Pathology and Forensic Medicine
Glucose incorporation into glycogen molecules of hypertrophied slow and fast twitch muscles in vitro.: Yong Woon Kim, Jong Yeon Kim, Suck Kang Lee; Yeungnam Univ J Med. 1990;7(1):19-27. Published online June 30, 1990; DOI: https://doi.org/10.12701/yujm.1990.7.1.19

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Abstract PDF: This investigation was undertaken to clarify the in vitro effect of the various stimulations, such as exercise (E), insulin (I) direct electrical stimulation (EST) and the combinations of the above, on the glucose incorporation intro glycogen molecules (glycogen synthesis) of the normal slow (soleus) and fast twitch (plantaris) muscles, and the different responses of slow and fast twitch muscles to persistent overloads causing compensatory muscle hypertrophy. In resting state, slow twitch muscle has greater capacity for glycogen synthesis than fast twitch muscle, and responses of different muscle to various stimuli were differ as follows: In slow twitch muscle, the glycogen synthesis was increased by insulin, and electrical stimulation but not increased by exercise; exercise increased insulin sensitivity and the effect of electrical stimulation. Whereas the glycogen synthesis in fast twitch muscle was increased only by the stimuli combined with E and EST, and E, I, and EST. As the result of removal of synergistic muscle, both muscles were hypertrophied, and the degree of hypertrophy in response to persistent overload was higher in fast twitch muscle (182%) than slow twitch muscle (151%). In hypertrophied muscles, glycogen synthesis of soleus in any groups was lower than that of the control, but similar in plantaris. In conclusions, there were marked heterogeneity in different muscle fiber in the effects of exercise and insulin addition and electrical stimulation on muscle glycogen synthesis, and fast twitch muscle may be adapted more easily to that kind of persistent overload than slow twitch muscle.

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