motor and muscle Flashcards
1
Q
motor unit
A
a single motor neuron and all fibers it innervates
-composed of : the cell body of alpha efferent neuron, the axon, all muscle fibers innervated by the axon
*confined to 1 muscle
2
Q
of fibers in the MU depends on ____
A
how precise/powerful the movement are that the muscle normally does
Quads, gastroc, hamstrings > 1500 fibers
Hands have < 100
3
Q
twitch-type
A
respond to a single stimulus
4
Q
tonic-type
A
needs multiple stimuli to contract (eyes)
5
Q
summation
A
building tension in an additive fashion
6
Q
tetanus
A
state of sustained max tension resulting from repetitive stimulation
(we can’t get more force bc all the myosin have bonded)
7
Q
A
