Brainstem Flashcards
Globus pallidus:
- function
- input
- output
- lesion
f: regulation of voluntary movement
i: putamen, caudate, SCn
o: VA/VL thalamus
l: abnrml involuntary movement (dyskinesias)
Dentate nucleus:
- function
- input
- pathway
- output
f: planning, initiation and control of voluntary movement
i: premotor cortex, via pontocerebellar system
p: sup. cerebellar pedunc -> contra. red nucleus
o: contralateral VA/VL thalamus
Interposed nuclei:
- function
- input
- pathway
- output
f: influences limb flexor muscles
i: anterior lobe of cerebellum
p: sup. cerebellar pedunc -> contra. red nucleus
o: contralateral VA/VL nucleus
Fastigial nuclei:
- input
- pathway
- output
i: vermis
p: inferior cerebellar peduncle
o: vestibular nuclei
Inferior cerebellar peduncle:
- function
- input
- pathway
- output
f: transmits axons from inferior olivary nucleus
i: contralateral inferior olive; ipsilateral verstibular nucleus
o: ipsilateral cerebellum
Inferior olivary complex:
- function
- pathway
- output
f: control, coordinate movement; sensory processing
p: end as climbing fibers
o: contralateral cerebellar cortex
Superior olivary complex:
- function
- input
- pathway
- output
f: ascending-descending auditory pathways; ITDs
i: bilateral choclear nuclei via trapezoid body
p: ipsilateral lateral lemniscus
o: inferior colliculus
Pontine nuclei:
- input
- pathway
- output
i: ipsilateral cerebral cortex (motor, premotor)
p: mossy fibers
o: contralateral cerebellum
Middle cerebellar peduncle:
- function
- input
- output
f: connect pons and cerebellum
i: pons
o: cerebellum
Superior cerebellar peduncle:
- function
- input
- pathway
- output
f: connect cerebellum to midbrain
i: dentate nuc, interposed nuc. (cerebellum)
p: red nucleus
o: contralateral VA/VL thalamus
Cerebral peduncle:
- function
- output
f: transmits corticospinal tract
l: contralateral spastic paralysis, weakness of lower half of face
Inferior colliculus:
- function
- input
- pathway
- output
f: auditory processing center
i: auditory cortex; bilateral cochlear nucleus
p: bilateral
o: ipsilateral medial geniculate nucleus
Superior colliculus:
- function
- input
- output
f: visual processing center, coordinate eye movement
i: retina, primary visual cortex
o: sensory and motor centers
Medial geniculate nucleus:
- function
- pathway
f: connects inferior colliculus with auditory cortex
p: cochlea -> SON -> IC -> MGN -> AC
Lateral geniculate nucleus:
- function
- input
- pathway
- output
f: connects optic nerve to occipital love
i: reitnal ganglion cells
p: Magno (1,2: where); parvo (3-6; what)
o: primary visual cortex (occipital)
