Skeletal muscle function in older people
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Top Contributors - Saeed Dokhnan, Kim Jackson and Lucinda hampton
Introduction [edit | edit source]
Aging effects all body organs and systems , one of these systems which we consider to discuss in this page is the skeletal muscle, there are many changes that occur to the muscular system due to aging process,.
By the age of 80, 40-50% of muscle sstrength, muscle mass, alpha motor neurons and muscle cell are lost. [1]
In this page we will highlight the most important changes to muscles which affect their performances, and as the muscle and motor unit are interrelated to each other it is important to include the motor unit in this process
Effect of aging on the Motor Unit[edit | edit source]
In the aged motor unit there are decreased in the number of functional motor units associated with enlargement of the Cross sectional area of the remaining units, this motor unit remodelling is achieved by selective denervation of muscle fibers, especially type 2 b fibres, followed by re-ennervation by axonal spouting from juxtaposed innervation units
Effect of aging on the muscle[edit | edit source]
- Muscle strength:
- Contractility:
- Mass:
- Number of fibers:
- Fiber area:
- Type of fibers:
Local muscle endurance:
[edit | edit source]
http://www.ncbi.nlm.nih.gov/pubmed/24948676
http://www.ncbi.nlm.nih.gov/pubmed/24903024
References[edit | edit source]
- ↑ Timothy L.et.al 2007