Kinesiology 1080A/B Lecture Notes - Tiger Woods, Peripheral Neuropathy, Quadriceps Femoris Muscle
4 Sep 2014
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Document Summary
Monosynaptic stretch reflex on patella tendon results in stretch of the quadriceps muscles: hammer strike, muscle spindles of quadriceps send stretch info to the spinal cord, single synapse onto alpha motorneuron of quadriceps and contraction of that muscle, the simplest of all stretch reflexes because it contains only one synapse, takes about 50 15 20 ms: too quick for the brain to be involved. Backward translation (cid:224) gastrocnemius and hamstring (posterior muscle groups: bring center of mass back over your base of support, what you get in this type of paradigm is a distal to proximal muscle strategy (cid:224) unique to postural control, the most distal muscle group is gastrocnemius (furthest away from brain) but it gets activated first followed by activation of hamstring after 5 15 ms, mostly proximal to distal muscle strategy, for example throwing action (cid:224) shoulder down arms to fingers.
