Ticker

6/recent/ticker-posts

Stretch reflex

Stretch Reflex

Only two neurons are involved; the cell body of lower motor neuron is stimulated directly sensory neurons, with no connector neuron in between.

For example, knee jerk is an example.

Stretch Reflex prevents injury due to overstretching of muscle.

When stretching agonist muscle contracts, and antagoinst muscle relaxes.



Branches of afferent fibers also synapse with interneurons that inhibit motor neurons controlling antagonistic muscle.

Stretch stimulus causes antagonists to relax.

All strech reflex are monosynaptic, they involve single synapse and ipsilateral (motor activity on same side of body).


Reflex arc that inhibits motor neurons serving antagonistic muscle are polysynaptic.


Post a Comment

0 Comments