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beta motor neuron
English Wikipedia - The Free Encyclopedia
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Beta motor neuron
Beta motor neurons
(
ß motor neurons
), also called
beta motoneurons
, are a kind of
lower motor neuron
, along with
alpha motor neurons
and
gamma motor neurons
. Beta motor neurons innervate
intrafusal fibers
of
muscle spindles
with collaterals to
extrafusal fibers
(type of slow twitch fibers). Axons of beta motor neurons (as alpha and gamma motor neurons) are
myelinated
. Alpha, gamma and beta
motor neurons
are all efferent neurons that originate from the
anterior grey column
of the
spinal cord
and travel to
skeletal muscles
. Alpha motor fibers have a larger diameter and higher conduction velocity than beta and gamma motor fibers.
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