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자료유형
학술저널
저자정보
Kim, Min Kyu (Department of Physical Therapy, The Graduate School, Sahmyook University) Ko, Young Jun (Department of Physical Therapy, The Graduate School, Sahmyook University) Lee, Hwang Jae (Department of Physical Therapy, The Graduate School, Sahmyook University) Ha, Hyun Geun (Department of Physical Therapy, The Graduate School, Sahmyook University) Lee, Wan Hee (Department of Physical Therapy, The Graduate School, Sahmyook University)
저널정보
물리치료재활과학회 Physical therapy rehabilitation science Physical therapy rehabilitation science 제4권 제1호
발행연도
2015.1
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38 - 43 (6page)

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Objective: To investigate and compare the size of the rectus femoris (RF), tibialis anterior (TA), and medial gastrocnemius (GMM) using ultrasound (US) imaging in young, elderly, and very elderly groups. Design: Cross sectional study. Methods: This study consisted of 25 young (age 20 years), 24 elderly (age 65-74 years), and 25 very elderly (age 75-90 years) people with no physical dysfunctions. The cross sectional area (CSAs) of the RF and muscle thickness of the TA and GMM were measured at rest and during contraction using an US system. Results: The CSA of the RF and thickness of the TA and GMM were significantly smaller in the elderly and very elderly groups than in the young group (p<0.05). There was a significant difference of the CSA of the RF at rest and during contraction between elderly and very elderly group (p<0.05). In the comparison of the TA and GMM thickness between elderly and very elderly groups, there were no significant differences except for the TA thickness during contraction. There was a significant difference in the percentage change in RF CSA among the three groups (p<0.05). Conclusions: Our results revealed loss of muscle mass in the RF, TA, and GMM in elderly and very elderly people (${\geq}65$ years old). In particular, the greatest age-related decline in muscle mass was observed for the RF. Furthermore, the CSA of the RF declined with aging in the very elderly groups (${\geq}75$ years old).

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