Section 5, Exam 3

Question 1

What kind of graded potential does muscle spindle stimulation cause in an alpha motor neuron?

Answer 1

EPSPs (excitability)

Question 2

What kind of graded potential does GTO stimulation cause in an alpha motor neuron?

Answer 2

IPSPs (inhibition)

Question 3

Excites or causes the muscle that is stretched to contract and generate force

Answer 3

Stretch Reflex

Question 4

Inhibits or causes the muscle that has been contracted with maximum force to relax

Answer 4

Inverse Stretch Reflex

Question 5

Facilitates or excites the muscle being stretched; a muscle contraction or a gradual increase in muscle tension occurs

Answer 5

Stretch Reflex

Question 6

The ____ or ____ stretch reflex component responds to a quick stretch

Answer 6

Phasic; dynamic

Question 7

The ____ or ____ stretch reflex component responds to a slow stretch

Answer 7

Static; tonic

Question 8

Diminished response to quick stretch (patellar tendon reflex) may be a sign of:

Answer 8

1. Spinal shock
2. Pathology of the dorsal roots
3. Peripheral motor nerve neuropathy

Question 9

The _____ stretch reflex component is important for maintaining static standing posture because as a muscle is slowly stretched, the muscle tension opposing the stretch gradually increases.

Answer 9

Static/Tonic

Question 10

The quick response in the stretch reflex is due to the _____ region of the m. spindle being most responsive

Answer 10

Equatorial

Question 11

The slow response in the stretch reflex is due to the _____ region of the m. spindle being most responsive

Answer 11

Polar (only static) and equatorial

Question 12

True or False:

The inverse stretch reflex only inhibits muscle contraction in the alpha motor pool in the immediate future.

Answer 12

True