brainstem Flashcards
divisions of brainstem
medulla
pons
midbrain
medulla reflex centers
cardiovascular
respiratory
vestibular
medulla cranial nerves
IX, X, XI, XII
closed medulla has
central canal
open medulla has
4th ventricle
___ exit the medulla through post olivary sulcus
IX, X, XI
___ exit medulla through pre olivary sulcus
XII
pons function
pathway for descending signals between forebrain and cerebellum or medulla, or ascending signals between medulla and thalamus
respiratory centers for control rate of breathing
pons CNs
V, VI, VII, VIII
pons divided into
tegmentum and base
pons base
descending fibers running rostrocaudally
pons tegmentum
site of several cranial nerve nuclei and connections to the inferior and superior cerebellar penduncles
cerebllar peduncles fibers connect
superior: cerebellum –> midbrain
middle: cerebellum –>pons
inferior: cerebellum–> medulla
CN at ponto medullary junction
7 and 8 and 6
CN at pons base
V
___ exit from base of pons through middle cerebllar peduncle
V
___ exit inferior pontine sulcus at pontomedullary junection
VI, VII, VIII
midbrain connects
brainstem and forebrain
midbrain functions
eye movements and pupillary light reflex
auditory and visual processing
midbrain CN
III and IV
midbrain divided into
tectum and cerebral peduncle
midbrain tectum
roof-dorsal to cerebral aqueduct
two pairs of nuclei-superior and inferior colliculi
IV emerges caudal to inferior colliculi
superior colliculi
visual attention, tracking objects, focusing
inferior colliculi
relay from inner ear, reflexive response to sound
___ exits midbrain through interpeduncular fossa
CN III
___ exits midbrain dorsally below inferior colliculus
CN IV
