UMN Pathways

Question 1

lateral corticospinal tract

Answer 1

cortical input
location in spinal cord: dorsolateral
decussates
function: facilitory to flexors, distal musculature, skilled, fine movement

Question 2

rubrospinal tract

Answer 2

cortical input
location in spinal cord: dorsolateral
decussates
function: facilitory to flexors, distal musculature, gait

Question 3

pontine reticulospinal tract

Answer 3

cortical input
location in spinal cord: ventromedial
doesn't decussate
ipsilateral
function: antigravity, muscle tone, proximal extensors, faciltates extensors, gair

Question 4

medullary reticulospinal tract

Answer 4

cortical input
location in spinal cord: ventromedial
doesn't decussate
bilateral
function: antigravity, muscle tone, proximal extensors, inhibits extensors, gait

Question 5

lateral and medial vestibulospinal tract

Answer 5

no cortical input
special sensory
location in spinal cord: ventromedial
doesn't decussate
function: facilitates proximal extensors, muscle tone, antigravity, gait

Question 6

other tracts: tectospinal tract, ventral corticospinal tract

Answer 6

location in spinal cord: ventromedial

function: faciltates neck extensors, muscle tone, antigravity, posture