Older adults Flashcards
1
Q
PNS changes
A
-loss of myelianted nerve fibers
-decreaesd ability of nerves to regenerate and reinnervate muscle
2
Q
CNS changes
A
-deficits in msucle activation
3
Q
MSK changes
A
- collagen becomes more cross linked
-elastin undergoes structural changes
-decreased water content of CT=
greater stiffness and loss of flexibility
4
Q
morphological changes
A
-decreased total # of fibers
-type II atrophy more
-loss of motor units w increaes in size of remaining motor units
-increase in intramuscular fat
5
Q
physiological changes
A
- slower contractile propertieis: slower time to epak tension and rate of relaxation
-decreased max shortening velocity
6
Q
protein needs
A
1.5 g/kg of BW
7
Q
cardiac changes
A
-decreased contractility of hearts L ventricular wall- decreased pumping capacity
- decreased elasticity of arteries, veins, aorta
8
Q
electrical condution changes
A
-decreased number of pacemaker cells in SA node
-increase in elastic and collageneous tissue in all parts of conduction system
