PSY/CS330 Human Factors
01/11/2001
Day 1-9
The Stretch Reflex
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