Brainstem Flashcards
brain gives rise to which cranial nerves
olfactory nerve (CN I) and optic nerve (CN II)
brainstem receives blood supply from
vertebrobasilar system
contents of medulla oblongata anterior surface
- anterior median fissure containing anterior spinal artery
- pyramid olivary nuclei
- roots of CN 12
- decussation occurs here
contents of medulla oblongata inferior cerebellar peduncles aka lateral surface contain
roots of CN 9 10 11
contents of medulla oblongata posterior surface
- fourth ventricle
- posterior median sulcus containing septum of neuroglia of the spinal cord
- gracile and cunate
crus cerebri
basis
midbrain is marked by
two superior and two inferior colliculi
colliculi concerned with visual reflexes
superior colliculi
colliculi concerned with auditory pathway
inferior colliculi
division of dorsal pons
median sulcus divides it into medial eminence & facial colliculus
overlies abducent nucleus
medial eminence and facial colliculus
over lies vestibular nuclei
vesitublar area
substantia nigra is apart of
midbrain
contain motor tracts in midbrain
cerebral peduncles
contains the pigmented red nuclei and the reticular formation
tegmentum
contains autonomic respiratory centers
pons
autonomic respiratory centers
pneumotaxic apneustic center centers regulate the rate and depth of breathing
relay somatic sensory information to the thalamus
nucleus cuneatus and the nucleus gracilis
regulates both the heart’s rate and its strength of contraction
cardiac center in medulla oblongata
controls blood pressure
vasomotor center in medulla oblongata
regulates the respiratory rate
respiratory center in medulla oblongata
participates in cyclic activities such as arousing the cortex to consciousness and controlling the sleep-wake cycle
reticular formation
