Brainstem Anatomy Flashcards
what are the main functions of the brainstem?
breathing, BP, HB, swallowing, alertness, temp
what is the dorsal area of the midbrain called?
tectum
what lies on the tectum of the midbrain in the dorsal view?
superior and inferior calliculi
what is superior colliculus involved in?
vision
what is inferior colliculus involved in?
hearing
the ventral surface of the midbrain is what structure?
cerebral peduncle
what is the hole in the dorsal portion of the X section of the midbrain?
cerebral aqueduct
which portion of the brainstem in X section looks like a bat?
pons
which portion of the brainstem in cross section has cerebral aqueduct?
midbrain
which portion of the brainstem in cross section has 4th ventricle in dorsal position?
pons and medulla
what portion of the medulla does decussation of the DCML tract occur? caudal or rostral
caudal
the decussation of the DCML occurs in the caudal medulla and switches from what structure into what other structure?
nucleus gracilis and cuneatous into the medial lemniscus
where is the medial lemniscus in the medulla?
central portion
where are the spinothalamic and hypothalmospinal tracts in the medulla?
lateral ventral edge
where is the corticospinal tract in the medulla?
ventral portion in the pyramid
what is on the ventral view of the medulla in the center?
pyramids
just lateral to the pyramids of the medulla are the what?
olives of the medulla
what three arteries feed the medulla?
posterior inferior cerebellar artery
vertebral artery
anterior spinal artery
the posterior inferior cerebellar artery serves what portion of the medulla?
dorsolateral regions
the vertebral artery serves what portion of the medulla?
olives
the anterior spinal artery serves what portion of the medulla?
pyramids
in the mid medulla, where does the tract of the DCML lie?
in the pyramids
what is on the lateral side of the cross section of the pons?
middle cerebral peduncle
what are the two arteries that feed the pons?
anterior inferior cerebellar artery
pontine artery
does the pontine artery feed the lateral or medial portion of the pons?
medial
does the anterior inferior cerebellar artery feed the lateral or medial portion of the pons?
lateral
is the tract of the corticospinal tract more anterior or posterior to the other tracts in the pons?
anterior
what tracts are the most posterior in the pons?
medial lemniscus of DCML and the STT/hyposthalamospinal
what vessel feeds all the tracts in the pons?
pontine artery
what vessel feeds the middle cerebral peduncle in the pons?
anterior inferior cerebellar artery
what vessel feeds all of the midbrain?
posterior cerebral artery
what portion of the midbrain does the corticospinal tract traverse?
the cerebral peduncle
what portion of the midbrain does the DCML, STT and hypothalamospinal tracts traverse?
in the medial area
