The Brainstem Flashcards
Between the peduncle
Also called the basal cistern
Impt for neurosurgeon, because of the nerves thst pass through
Interpeduncular fossa / interpeduncular cistern
Tumors can pass through and compress the cranial nerves
Comprise the brainstem
Diencephalon
Midbrain (cerebral peduncle)
Pons (basis pontis)
Medulla oblongata
Junction between the pons and the medulla
Pontomedullary sulcus
Largest cerebellar peduncle
Middle cerebellar peduncle / brachium pontis
Enlarging ventricle, stimulation of obex leads to…
Vomiting
Sensory neurons located dorsally
Motor neurons located ventrally
Distinction between motor and sensory persist up to this because of
Sulcus terminans
Afferents to the special senses
SSA
Sensory nerves that develop in association with the GI system
SVA
Chewing
Swallowing and digesting
Smiling
SVE
Know about:
Edinger - Westphal nucleus
Longest nerve ever
Spinal nucleus of CN V
-for pain in the face
Ambiguous nucleus in the medulla
CN IX and X, histologists can’t tell them apart
Cross-over to the other side
Decussation
There is no such thing as left or right brain
True
Means putting layers and layers of films and wiring
Impt when dealing with spinal cord problems
Lamination
Portion of the reticular formation comcerned with arousal
Damage leads to coma
Can be overexcited by psychotopic drugs, caffeine and overreactive - ADHD
ARAS
Ascending Reticular Activating System
Moves the eyeballs in such a way that we don’t get cross-eyed
Medial longitudinal fasciculus
Cranial nerve 6 will exit here
Clivus
Prone to forming tumors. What cranial nerve?
VIII
Largest opening where cranial nerves pass
Foramen magnum
What is impt with 4th ventricle?
Know!
Cranial nerves - extramedullary
Tracts - intramedullary
Red nucleus
Iron is deposited
Mainly responsible for movement in animals
For babies
Superior + inferior ____________
Corpora quadrigemina
Know!!!
Only one of its kind, exits dorsally
Receives afferents from hypothalamus, amygdala
Activated during stress
Neurons seem to be depleted in PTSD patients
Locus ceruleus
in Rostral pons
Gives you the butterflies
Allergic reactions
Blood pressure rising
Solitary tract and nucleus of the vagus
Decussation of the motor pathway
Contain the descending fibers of the corticospinal tract
Pyramid
For lab exam!
Gracile tubercle (clava)
