Unit 7

Question 1

Some skeletal muscle is derived from the bronchial arches (embyrologically). The functional classification of the neurons that innervate that muscle is:

Answer 1

SVE

Question 2

The two motor neuron pools are known as:

Answer 2

1. Anterior corticospinal tract

2. Lateral corticospinal tract

Question 3

The anterior corticospinal tract innervates _____ muscles

Answer 3

Axial and proximal muscles

Question 4

The lateral corticospinal tract innervates ____ muscles

Answer 4

Appendicular muscles

Question 5

Pyramidal tracts are associated with ____ descending motor systems, while extrapyramidal are associated with ____

Answer 5

Conscious, unconscious

Question 6

____ cells are part of the intralaminar system of cells that help to redistribute information from descending systems so that the proper motor neurons get turned on and off as needed

Answer 6

Renshaw

Question 7

This type of reflex will excite one type of muscles on the right side of the body, but inhibit that same type on the left side of the body

Answer 7

Crossed extensor reflex

Question 8

The ____ reflex will “fan” the toes when swiping from posterior to anterior on the plantar surface of the foot (normally the toes would all flex)

Answer 8

Babinski

Question 9

Damage to ____ neurons results in spastic paralysis, hyper-reflexia and hypertonia

Answer 9

Upper Motor (UMN)

Question 10

Damage to ____ neurons results in flaccid paralysis, hypo-reflexia, and hypotonia

Answer 10

Lower motor (LMN)