Changes in Postural Muscle Dynamics as a Function of Age
| العنوان: | Changes in Postural Muscle Dynamics as a Function of Age |
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| المؤلفون: | Kenneth J. McLeod, Robert Huang, Clinton T. Rubin |
| المصدر: | The Journals of Gerontology Series A: Biological Sciences and Medical Sciences. 54:B352-B357 |
| بيانات النشر: | Oxford University Press (OUP), 1999. |
| سنة النشر: | 1999 |
| مصطلحات موضوعية: | Adult, Male, Aging, medicine.medical_specialty, Posture, Postural instability, Vibration, Internal medicine, medicine, Humans, Muscle fibre, Muscle activity, Muscle, Skeletal, skin and connective tissue diseases, Aged, Muscle force, Aged, 80 and over, Electromyography, business.industry, Dynamics (mechanics), Anatomy, Middle Aged, Endocrinology, Linear Models, Female, sense organs, Geriatrics and Gerontology, business |
| الوصف: | Histologic studies have demonstrated both a decrease in size and loss in number of type II muscle fibers with increasing age. Although these age-related histologic changes are believed to result in decreased strength and functional capacity, age-related changes in muscle force dynamics have not been clearly elucidated. Using vibromyographic (VMG) techniques, we recorded muscle activity of the soleus in 40 healthy adult volunteers spanning the age range of 20-82 years to test whether changes in postural muscle dynamics, in the frequency range of 0.1-50 Hz, were also associated with age. Although muscle dynamics below 15 Hz do not change with aging, the 30-50 Hz frequency components of the VMG were found to change significantly with advancing age (r = -.619, p = .0001). This was observed in both sexes independently. The observed age-related changes in muscle force dynamics demonstrate distinct physiologic alterations in muscle fiber activity. Further research will be required to fully elucidate the relationship between age-related changes in muscle fiber activity and other age-related conditions such as postural instability and osteoporosis. |
| تدمد: | 1758-535X 1079-5006 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7cde2f650f74f6371ba2b74bc0e36c23Test https://doi.org/10.1093/gerona/54.8.b352Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....7cde2f650f74f6371ba2b74bc0e36c23 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 1758535X 10795006 |
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