CH16: Brainstem Tracts 2 Flashcards
The pons processes motor information from here
cerebral cortex
Pons forwards information from the cerebral cortex to here
cerebellum
What nuclei (pons) process sensory info from the face? Which cranial nerve?
- pontine cranial nerve nuclei
- CN V
The pons controls contraction of muscles involved in:
- facial expression (CN VII)
- lateral eye movement (CN VI)
- chewing (CN V)
What does the midbrain connect?
diencephalon » pons
3 regions of the midbrain from anterior to posterior
- basis pedunculi
- tegmentum
- tectum
What does the cerebral aqueduct join?
third and fourth ventricles
What is the cerebral aqueduct?
small canal through the midbrain
What forms the midbrain basis pedunculi?
- cerebral peduncles
- substantia nigra
What are the BG nuclei (again)
- SN
- STN
- caudate
- putamen
- GP
- PPN
midbrain tegmentum: vertical tract positions
- most have similar positions as the pons
spinothalamic and medial lemniscus are more lateral in midbrain
What important structures does the midbrain TEGMENTUM contain?
- vertical sensory tracts
- superior cerebellar peduncle
- red nucleus
- PPN
- CN III and IV nuclei
What does the midbrain TECTUM contain?
- pretectal area
- colliculi
pretectal area is involved in
eye reflexes
- pupillary
- consensual
- accommodation
function of inferior colliculi
relay auditory info from cochlear nuclei to
» superior colliculus
» medial geniculate body (thalamus)
