The Motor Systems (F)

Question 1

What lamina are lower motor neurons located?

Answer 1

lamina IX of ventral/anteiror horn

Question 2

How does the medial lower motor neuron column change in sized throughout the spinal cord? 1. The lateral lower motor neuron? 2

Answer 2

1. uniform in length and size

2. enlarges in cervical and lumbar regions

Question 3

What do the medial cell bodies of the lower motor neuron innervate? 1. The lateral lower motor neuron? 2

Answer 3

1. more proximal muscles

2. more distal muscles

Question 4

What do the medial cell bodies of the lower motor neuron innervate? 1. The lateral lower motor neuron? 2

Answer 4

1. more proximal muscles

2. more distal muscles

Question 5

What are the grades for Myotonic Reflex Grading? 0-4. What type of lesion is this test for? 5

Answer 5

0. Absent reflexes
1. Hyporeflexia
2. Normal reflexes
3. Hyperreflexia
4. Clonus
5. supranuclear lesion

Question 6

What is being looked at in the cutaneous reflex? 1. What is it called if there is damage? 2

Answer 6

1. flexor plantar vs. extensor plantar reflex

2. Positive Babinski finding (extensor plantar)

Question 7

What area does damage to spinal cord typically affect the most? 1. What is sparred? 2

Answer 7

1. central more than periphery

2. sacral sparing

Question 8

What area does damage to spinal cord typically affect the most? 1. What is sparred? 2

Answer 8

1. central more than periphery

2. sacral sparing

Question 9

What are the tops of hair cells in the utricle and saccule imbedded into?

Answer 9

otolithic membrane

Question 10

What does the otolithic membrane contain? 1. What are they called? 2. What is the condition where these are lose? 3

Answer 10

1. calcium carbonate crystals
2. otoliths or otoconia
3. Benign paraoxymal positional vertigo

Question 11

What does the otolithic membrane contain? 1. What are they called? 2. What is the condition where these are lose? 3

Answer 11

1. calcium carbonate crystals
2. otoliths or otoconia
3. Benign paraoxymal positional vertigo

Question 12

If a patient goes from decerebrate to decorticate what does this mean? 1. Is it good or bad? 2

Answer 12

1. depth ascending

2. good

Question 13

If a patient goes from decorticate to decerebrate what does this mean? 1. Is it good or bad? 2

Answer 13

1. depth descending

2. bad

Question 14

As it moves distal, does extrapyramidal influence increase or decrease? 1. Pyramidal influence? 2

Answer 14

1. same on all (except hand and foot)

2. increases