L28 Flashcards
what does the lateral tract generally control
voluntary control of legs and arms
what does the medial tract generally control
postural/balance control, axial muscles
what does the corticospinal tract carry information down the spinal cord from
M1
PreMC
Primary somatosensory cortex
does more cross over to become lateral corticospinal or ventral/medial corticospinal
85% cross over for lateral corticospinal
what tract corresponds with the lateral tract
dorsal/lateral corticospinal
what tracts correspond to the medial tracts
ventro-medial (anterior) corticospinal
reticulospinal (pontine and medullary)
vestibulospinal (both)
where does the medial vestibulospinal tract run through
the medial longitudinal fasiculus
where does the medial vestibulospinal tract project onto
to the eyes primarily but some spinal cord
(head and neck msucles)
what does the lateral vestibulospinal tract project onto
projects from the lateral vestibular nucleus to postural muscles in spinal cord
what other tract does the lateral vestibulospinal tract work with
medial pontine reticulospinal tract
where does the pontine reticulospinal tract run from
the pontine nuclei
where does the lateral reticulospinal tract project from
medullary nuclei
what does the pontine reticulospinal tract do
excitation of extensor muscles of the limbs
what does the medullary reticulospinal tract do
inhibits extensor muscles of the limbs (turns on flexors)
what are the two main ascending tracts
dorsal column/medial lemniscal
and
spinothalamic tract
what type of info is the dorsal column moving
light touch, proprioception
what type of info is the spinalthalamic tract moving
pain, pressure, crude touch
where is the dorsal columns end goal
primary somatosensory cortex
explain the order of the synapses for the dorsal column system
starts at the spinal cord and crosses over at the medulla and, via the thalamus then projects on to the somatic sensory cortex
where is the spinothalamic system going to
somatosensory cortex and other areas
what are the three synapses or the path the spinothalamic system travels
crosses over in spinal cord then travels to the thalamus and from the thalamus to the primary somatosensory cortex
