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11 Cards in this Set
- Front
- Back
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Function of Rubrospinal tract?
Projects to contra or ipsilateral area? |
cerebellum uses it to make corrections to movements.
dessucates in Ventral tegmental area and project mainly to distal contralateral flexor muscles |
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Function of tectospinal tract?
Projects to contra or ipsilateral area? |
orients head and neck to moving stimuli
superior colliculus > dorsal tegmental dessucation > projects bilaterally to neck/head motor neurons |
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Function of reticulospinal tract?
Projects to contra or ipsilateral area? |
regulating muscle tone of AXIAL muscles and the adjustment of POSTURE.
originates in pons and medulla > pons fibers dont cross while medullary fibers do cross |
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The pons reticulospinal tract is ___________ while the medullary reticulospinal tract is ___________
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pons = net excitatory
medullary = net inhibitory |
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Medial vestibulospinal tract function?
projects to? |
coordinates head+neck+eye movements; continuation of MLF
descend bilaterally |
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Lateral vesibulospinal tract function?
projects to? |
regulates activity of ANTIGRAVITY EXTENSOR muscles mainly in the lumbar region
projects to ipsilateral antigravity/extensor muscles |
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function of primary motor cortext?
brodman area? |
Brodmann area 4
discrete specific movement; low threshold |
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function of premotor cortex?
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preplanning of motor movement:
dorsal premotor does internal cues = anticipate the correct time to hit button ventral premotor does visual cues = see the second light then hit button; also has the mirror neurons |
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function of frontal eye fields?
vertical gaze center? horizontal gaze center? |
stimulation in this area evokes eye movements toward the CONTRAlateral side of the body. Damage to this area impairs paying attention to the contralateral visual field.
vertical = sup colliculi + MRF horizontal = PPRF |
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function of Cingulate Motor Area
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controls emotional facial expressions/projects bilaterally
lesion of the upper facial nerve preserves function to the contralateral forehead area |
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corticobulbar projections?
gaze centers red nucleus vestibuloar nucleus |
gaze = bilateral
red nucleus = ipsilateral vestibular nucleus = contralateral |
