Motor Table

Question 1

Which upper motor neuron tract synapses on brain stem lower motor neurons?

Answer 1

the corticobulbar tract

Question 2

Where do do brain stem upper motor neuron tracts synapse?

Answer 2

EXCLUSIVELY on SPINAL lower motor neurons

Question 3

Which upper motor neuron tracts are located in the telencephalon?

Answer 3

corticospinal and corticobulbar

Question 4

List UMN nucleus and target LMN for corticospinal tract.

Answer 4

UMN nucleus: primary and secondary motor cortex

Target: flexor LMN

Question 5

List UMN nucleus and target LMN for corticobulbar tract

Answer 5

UMN nucleus: primary and secondary motor cortex

Target: brain stem

Question 6

List UMN nucleus and target LMN for rubrospinal tract.

Answer 6

red nucleus

flexor LMN

Question 7

List UMN nucleus and target LMN for tectospinal tract.

Answer 7

superior and inferior colliculi

target: cervical LMN (moves head in response to visual and auditory stimuli)

Question 8

List UMN nucleus and target LMN for lateral vestibulospinal tract.

Answer 8

UMN nucleus: lateral vestibular

target: extensor LMN. helps you stand upright.

Question 9

List UMN nucleus and target LMN for the medial vestibulospinal tract

Answer 9

medial vestibular nucleus

cervical LMN

Question 10

List UMN nucleus and target LMN for pontine reticulospinal tract

Answer 10

pontine reticular formation is the nucleus

function: extensor LMN (again helps with posture)

Question 11

List UMN nucleus and target LMN for the medullary reticulospinal tract.

Answer 11

medullary reticular formation

flexor LMN