Brain Stem & Cerebellum

imissyou419's version from 2016-10-18 20:00

Section 1

Question Answer
Cerebral aqueductallows CSF to flow from 3rd to 4th ventricle (at level of midbrain)
Cerebral peduncleslarge, corticospinal fibers running down (part of internal capsule), i.e. motor information originating in cerebral cortex and moving to spinal cord or terminate at brain stem
Basal portion of ponsfibers running laterally
Middle cerebellar peduncleconnect cerebellum to pons
Olivary nucleussends information to cerbellum for proprioception
Pyramidal decussationwhere motor information cross over
Pyramid corticospinal fibers (fibers reduced from cerebral peduncle - motor)
fourth ventricledorsal to pons and medulla and ventral to cerebellum
Difference between cerebellar peduncle and pyramid size meanslots of information termintaed at brain stem (pons)
Superior colliculivisual reflexes
inferior colliculiauditory reflexes
superior cerebellar pedunclesconnect cerebellum to midbrain and diencephalon
inferior cerebellar pedunclesconnect cerebellum to medulla oblongata and spinal cord
gracile tuberculus & cuneate tuberculusfiber tracts ascending from gracile & cuneate fasiculus (somatosensory info) after terminating at gracile& cuneate nuclei
gracile fasiculus & cuneate fasiculusfiber tracts ascending from spinal cord (somatosensory), they make up dorsal funiculus
corpora quadrigeminasuperior colliculi + inferior colliculi
periaquaductal grayneurons surrounding cerebral aquaduct responsible for pain control by releasing endogenous opiods
red nucleuslarge collection of neurons involved in motor control (pathway go down spinal cord)
pontine nucleilots of cerebral peduncle fibers terminate here, esp. motor info, small collection of neurons continue to descend down at level of medulla (corticospinal tract)
Nuclei of solitary tractvisceral sensory nuclei
Dorsal nuclei of vagusparasympathetic, motor nuclei
reticular formationlarge collectiono f neurons that does not form discrete nuclei, can participate in control of movement, modulation of pain, autonomic reflexes, arousal

Section 2

Question Answer
spino-cerebellum pathwayproprioception - input: spinal cord, to vermis & intermediate hemisphere
cerebro-cerebellum pathway (corticopontocerebellar)motor command - input: cerebral cortex, to lateral hemispheres
vestibulo-cerebellumequilibrium & balance - input: otolith organs, to flocculonodular

Section 3

Question Answer
sacral 5
coccygeal 1