PSY/CS330 Human Factors
01/11/2001
Day 1-5
The Muscular System - 2
uNeural Input
into the Muscle
lExtrafusal fibers are input by alpha motor neurons
uThese neurons are large and fast.
lIntrafusal Fibers are input by gamma motor neurons
uThese neurons are relatively small and slow.
uThey are involved in the control of muscle tone.
a
g