Descending tracts Flashcards
(26 cards)
lateral corticospinal
precise and skilled voluntary movement
ventral corticalspinal
voluntary movement distal extremities
rubrospinal tract
flexors of proximal limbs
reticulospinal tract
inhibit or facilitate posterior muscles above T6 and anterior muscles below T6
vestibulospinal tract
extensors of the back
tectospinal tract
turns head due to vision and hearing reflex
origin of corticospinal tracts
primary motor cortex, secondary motor cortex and parietal lobe
destination of corticospinal tracts
internuncial neurons or alpha motor neurons
decussation of cortical spinal tracts
most at pyramids and descend as lateral corticospinal tracts
some continue as anterior corticospinal tracts
lateral corticospinal tract runs
length of cord
anterior corticospinal tract stops where
mid-thoracic
origin of reticulospinal tract
reticular formation
destination of reticulospinal tract
alpha and gamma motor neurons
decussation of reticulospinal tract
various locations
origin of tectospinal tract
superior colliculus (midbrain)
destination of tectospinal tract
alpha and gamma motor neurons
origin of rubrospinal tract
red nucleus (midbrain)
destination of rubrospinal tract
alpha and gamma motor neurons
what info received by rubrospinal tract
cerebral and cerebellar info
origin of vestibulospinal tract
lateral vestibular nucleus
destination of vestibulospinal tract
alpha and gamma motor neurons
what info is received by vestibulospinal tract
inner ear (via vestibular nerve) and cerebellar info
sensory
afferent
motor
efferent
