1b Motor 1&2 Myotactic Reflex Flashcards Preview

Neuro B3 - Motor > 1b Motor 1&2 Myotactic Reflex > Flashcards

Flashcards in 1b Motor 1&2 Myotactic Reflex Deck (7)
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1
Q

What is the Myotactic Reflex?

A

stretch of muscle –> stretch of muscle spindle –> reflex response

2
Q

How are extrafusal muscle fibers in line with intrafusal spindle organ fibers?

A

they are parallel, so if muscle contracts, they contract - if muscle stretches, they stretch

3
Q

What type of afferent fiber is attached to the muscle spindle organ?

A

1a (fastest)

4
Q

What does the afferent fiber of the muscle spindle organ keep track of?

A

muscle length & dynamics

5
Q

Where does the efferent portion of myotactic reflex occur, relative to the muscle that sent the afferent signal?

A

In the same muscle that sent the afferent signal

6
Q

How does the myotactic reflex effect a group of muscles?

A

synergistic muscles are excited, antagonistic muscles are inhibited

7
Q

What does the Renshaw Cell do?

A

lateral inhibition of inhibitor (prevents inhibiting neuron from releasing its neurotransmitter)