Wk 2 - LE 4: Neuromuscular (supraspinal control)

Question 1

a-motorneurons will receive input from 3 different sources?

Answer 1

1) efferent neuron from the brain
2) afferent (sensory) neuron from tissue
3) spinal neurons

Question 2

Can a-motorneuron be excitatory and inhibitory ?

Answer 2

Yes

Question 3

Efferent neurons originate from the _____ and provide _________ input to switch on MNs

Answer 3

brain, supraspinal input

Question 4

Afferent neurons originate from ________ and provide _____ input

Answer 4

muscle, joints and skin, sensory input

Question 5

Spinal neurons provide _______ input to MNs

Answer 5

rhythmic input

Question 6

Muscle action is initiated by…

Answer 6

supraspinal input from the brain

Question 7

What are three very important areas of the cerebral cortex involved in movement?

Answer 7

1) premotor cortex
2) Supplementary motor cortex
3) motor cortex

Question 8

What area in the cerebral cortex coordinates sensory cues (e.g. bright lights) with required movements (e.g. neck extension)?

Answer 8

Premotor cortex

Question 9

What area in the cerebral cortex programs the motor plan (especially for complex tasks)?

Answer 9

Supplementary motor area

Question 10

What area in the cerebral cortex initiates and executes movement?

Answer 10

Primary motor cortex

Question 11

What neurons originate within the motor cortex and project to different spinal levels

Answer 11

The corticospinal neurons

Question 12

Where does the crossover of the corticoneurons occur?

Answer 12

At the base of the medulla they decussate (cross over)