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motor pathways (lateral system (characteristics (terminates…
motor pathways
lateral system
characteristics
terminates contralaterally
focused terminations
terminates on motor neurons and interneurons
pathways
lateral corticospinal tract
movement of limb muscles
rubrospinal tract
(red nucleus)
possibly directs arm and hand movements
medial system
pathways
tetcospinal tract
origin:
superior colliculus
function:
visually track moving objects
decussates in the midbrain and travels contralaterally
mainly moves neck and upper trunk muscles
reticulospinal tract
supports posture and movement of trunk and proximal limbs
facilitates large movements like jumping
origin:
pons and medulla
ipsilateral course
vestibulospinal tract
descending projections help control postural adjustments
ascending projections modulate eye movements
input:
vestibular nerve, cerebellum
anterior corticospinal tract
movement of trunk muscles
characteristics
typically terminates
bilaterally
terminates widely
terminates on interneurons