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학제간연구 과학기술학 뇌인지과학 기술정책 기타 복합학

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논문 기본 정보

자료유형
학술저널
저자정보
Hsu, Jeffrey (Department of Kinesiology, University of Maryland, College Park) Koh, Kyung (Department of Kinesiology, University of Maryland, College Park) Park, Yang-Sun (Department of Kinesiology, University of Maryland, College Park) Kwon, Hyun-Joon (Department of Kinesiology, University of Maryland, College Park) Kim, Yoon-Hyuk (Department of Mechanical Engineering, College of Engineering, Kyunghee University, Global Campus) Shin, Joon-Ho (Department of Stroke Rehabilitation, National Rehabilitation Center) Shim, Jae-Kun (Department of Kinesiology, University of Maryland, College Park)
저널정보
한국운동역학회 한국운동역학회지 한국운동역학회지 제25권 제4호
발행연도
2015.1
수록면
371 - 381 (11page)

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Object : The purpose of this study was to investigate aging-related changes of intrinsic and extrinsic hand muscles in their strength, cross-sectional area and volume, force control, and multi-digit synergies. It was hypothesized that aging would negatively affect distal muscles (intrinsic muscles) more than proximal muscles (extrinsic muscles). Method : Nine young and eleven older right-handed participants underwent MRI scans of the hand and forearm. Muscle cross-sectional areas and volumes of the intrinsic and extrinsic hand muscles were determined. Result : Muscle volume of the intrinsic muscles were larger in the younger group than the older group while muscle volume of the extrinsic muscles did not differ. For the cross-sectional area, both the intrinsic and extrinsic muscles of the younger group were larger than the older group. The maximum strength of the intrinsic muscles of the young group was 31% greater than the older group ($399.1{\pm}26.4$ vs $270.2{\pm}22.9Ncm$, p < 0.05) while the extrinsic muscles showed no significant difference. Although the elderly group showed a trend of decreased force control and multi-digit synergies, no statistical differences were found. These findings indicate aging-related decreases in hand muscle size and strength affect intrinsic muscles more than extrinsic muscles, thus supporting the hypothesis that sarcopenia affects the muscle size and strength of distal muscles more than proximal muscles. Conclusion : The aging-related decreases in hand muscle size and function were more apparent in intrinsic hand muscles, located more distally, than extrinsic muscles, located more proximally.
#Aging #Intrinsic Hand Muscle #Extrinsic Hand Muscle #MRI

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참고문헌 (57)

참고문헌 신청
R ANAKWE / 2007 / Grip strength and forearm circumference in a healthy population / The Journal of Hand Surgery: Journal of the British Society for Surgery of the Hand 32(2):203~209 Crossref Association / 1998 / Recommendations for cardiovascular screening, staffing, and emergency policies at health/fitness facilities / Medicine & Science in Sports &Exercise 30(6):9 google schola Brown, W. F / 1972 / A method for estimating the number of motor units in thenar muscles and the changes in motor unit count with ageing / Journal of Neurology, Neurosurgery & Psychiatry 35(6):845~852 google schola Carmeli, E / 2003 / The aging hand. Journals of Gerontology / Series A : Biological Sciences and Medical Sciences 58(2):146~152 google schola Christ, C. B / 1992 / Maximal Voluntary isometric force production characteristics of six muscle groups in women aged 25 to 74 years / American Journal of Human Biology 4:537~545 google schola

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