Brainstem (Surface Anatomy) & Fourth Ventricle Flashcards
Brainstem consists of
Midbrain
Pons
Medulla
Brainstem occupies what fossa
posterior cranial fossa
what junction is found in the rostral boundary of the brainstem
midbrain- diencephalic junction
what junction is found in the caudal boundary of brainstem
cervicomedullary junction
where is the caudal boundary of the brainstem located
at level of foramen magnum and pyramidal decussation
function of brainstem
conduit for ascending and descending tracts to the higher centers in the forebrain
contains reflex centers (ass for respiration, CV functions, consciousness)
contains nuclei of CN III - XII
cerebellum is attached to the ____ surface of the pons and upper medulla
posterior surface
division of brainstem
tectum - roof
tegmentum - covering
basis - most ventral
tectum is only in
midbran = superior and inferior colliculus
tegmentum is ventral to the
cerebral aqueduct in midbrain
4th ventricle in pons and medulla
make up the main bulk of brainstem nuclei and reticular formation
Tegmentum
most ventral portion of brainstem
basis
large collections of fibers making up the corticospinal and corticobulbar tracts like
basis
found on the ventral surface of midbrain
cerebral peduncles
interpeduncular fossa
found on the dorsal surface of midbrain
tectum - superior and inferior colliculi
found on ventral surface of pons
transverse fibers, convex
pons is limited dorsally by the
4th ventricle
Dorsolaterally, pons are attached to the cerebellum by the
superior, middle, and inferior cerebellar peduncles