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Alpha vs. Gamma Motor Neurons
N/A
6
Anatomy
Undergraduate 2
09/18/2012
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Term
alpha motor neuron
 Definition
high conduction velocities (50-120 m/s)
Term
alpha motor neuron
 Definition
innervate majority of skeletal muscles (extrafusal muscle fibers)
Term
alpha motor neuron
 Definition
activate prime movers of motor act
Term
gamma motor neuron
 Definition
slower velocity (40 m/s)
Term
gamma motor neuron
 Definition
innervate intrafusal muscle fibers within muscle spindle
Term
gamma motor neuron
 Definition
responsible for maintaining muscle tone and muscle readiness for motor act
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