brainstem - surface anatomy and 4th vent Flashcards
the brainstem is composed of the _____
midbrain, pons and medulla
what does the brainstem occupy in the cranium
posterior cranial fossa
what is found at the rostral boundary of the brainstem
Midbrain-diencephalic junction
what is found at the caudal boundary of the brainstem
cervicomedullary junction
level of cervicomedullary junction
At level of foramen magnum and pyramidal decussation
functions of the brainstem
conduit for asc and desc tracts to forebrain
contains reflex centers for respiration, CV functions and consciousness
contains nuclei of CN III-XII
which cranial nerve nuclei does the brainstem contain
nuclei of CN III-XII
the cerebellum is attached to ______ and ______
posterior of pons and upper medulla
where is tectum found
Only in midbrain = superior and inferior colliculus
where is tegmentum found
ventral to CA in midbrain
ventral to 4th in pons and medulla
makes up the main bulk of brainstem nuclei and reticular formation
tegmentum
most ventral portion of brainstem
pons
significance of basis
has fibers that makes up corticospinal and corticobulbar tracts
found on ventral surface of midbrain
cerebral peduncles and interpeduncular fossa
found on dorsal surface of midbrain
tectum - sup and inf colliculi
found on ventral surface of pons
transverse fibers, convex
what limits the pons dorsally
4th ventricle
attachments of the pons dorsolaterally
attached to the cerebellum by the superior, middle, and inferior cerebellar peduncle
found on ventral surface of medulla
pyramids
rostral medulla - olives or inferior olivary nuclei
found on dorsal surface of medulla
caudal medulla - posterior columns and their nuclei (gracilis-cuneatus)