Lecture 10- Motor Pathways

Question 1

IVDD is caused by-

Answer 1

The disc protruding into the spinal canal

Question 2

The cell bodies of Upper motor neurons (UMN) are iin the-

Answer 2

Brain

Question 3

The cell body of Lower motor neurons (LMN) is in the-

Answer 3

spinal cord

Question 4

What NT do LMN emit?

Answer 4

Ach

Question 5

Location of UMN for thoracic limbs?

Answer 5

C1-C5

Question 6

Location of LMN for thoracic limbs?

Answer 6

C6-T2

Question 7

Location of UMN for pelvic limbs?

Answer 7

T3-L3

Question 8

Location of LMN for pelvic limbs

Answer 8

L4-S3

Question 9

The bulging locations of LMN cell bodies are called-

Answer 9

Intumescences

Question 10

Paralysis vs paresis

Answer 10

Paralysis in total loss of voluntary movement, paresis is partial

Question 11

Signs of a LMN lesion

Answer 11

Paralysis/paresis
Weak/absent spinal reflexes
Decreased muscle tone
Rapid neurogenic atrophy

Question 12

Signs of UMN lesion

Answer 12

Paralysis/paresis
Normal or increased muscle tone
Mild disuse atrophy
Clonus (exaggerated reflex)
Crossed extensor reflex