LEC 4: Motor System Flashcards
1
Q
direction of motor control
A
brain –> spinal cord -> muscle
2
Q
the cell bodies of motor neurons are located
A
ventral portion of spinal cord
3
Q
motor neurons innervate
A
muscle fibers
4
Q
motor neuron + muscle fiber =
A
motor unit
5
Q
neuromuscular junction
A
point of contact btwn motor neuron an dskeletal muscle cell
6
Q
corticospinal tract
A
- connections btwn brain and spine
- motor
- lateral and medial
7
Q
differences btwn medial and lateral corticospinal tract
A
- lateral: contralateral
- medial: ipsilateral and contralateral (more complicated)
8
Q
lateral pathway for cotricospinal tract
A
braun to muscle:
- arms, hands, fingers, lower legs, feet
crossing point at medulla
9
Q
medial pathway for corticospinal tract
A
brain to muscle:
- trunk, postural muscles, walking
projects contralaterally AND ipsilaterally
10
Q
A
