Neuro Lab Block I- Brain Stem Gross Anatomy

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superior colliculus

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inferior colliculus

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trochlear nerve CN IV

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superior cerebellar peduncle

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middle cerebellar peduncle

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inferior cerebellar peduncle

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obex

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cuneate fasciculus

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gracile fasciculus

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gracile nucleus

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cuneate nucleus

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sulcus limitans

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cerebral peduncle

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pons

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trigeminal nerve

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pyramid

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olive

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motor decussation

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accessory nerve

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hypoglossal nerve

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glossopharyngeal and vagus nerve

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vestibulocochlear nerve

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abducens

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facial nerve

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oculomotor nerve

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a. frontal lobe
b. parietal lobe
c. occipital lobe
d. temporal lobe

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a. parietal lobe
b. limbic lobe: on edge of lateral ventricle, beneath what we can see of limbic lobe
c. frontal lobe
d. temporal lobe
e. occipital lobe

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a. central sulcus- upward at angle from lateral sulcus; extends a bit to medial surface
b. lateral sulcus: groove between temporal and frontal lobes and temporal/parietal lobe
c. pre-occipital notch: helps to know where temporal stops and occipital starts

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a. superior frontal gyri
b. middle frontal gyri
c. inferior frontal gyri
d. precentral gyrus- primary motor cortex; motor instructructions programmed here

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a. postcentral gyrus- important because sensory region in cerebral hemisphere
b. superior parietal lobule
c. supramarginal gyrus- we could follow lateral sulcus up and it would dead end here
d. inferior parietal lobule- if damaged on R side, person will ignore left side of world= lateral neglect
e. angular gyrus- superior temporal sulcus dead ends here
f. cingulate gyrus: not just in parietal lobe, a lot of times just lumped into limbic lobe

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a. superior temporal gyri (much auditory processing here)
b. middle temporal gyri
c. inferior temporal gyri
d. parahippocampal gyrus (structures inside bulge like hippocampus)

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a. olfactory bulb
b. olfactory tract
c. mammillary body
d. uncus
e. orbital gyri
f. infundibular stalk: attached to pituitary, when brain removed pituitary left behind because it sits in body pocket
g. middle cerebellar peduncle (brainstem to cerebellum)
h. cerebellar hemisphere- largest portion
i. pyramid on surface of brainstem (medulla)

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a. insula
b. opercula of frontal lobe
c. superior temporal gyrus

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a. gyri of insula

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a. parieto-occipital sulcus
b. calcarine sulcus: major sulcus running back on occipital lobe; main visual cortex here

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a. septum pellucidum of corpus callosum, forms wall of lateral ventricle
b. splenium of corpus callosum
c. genu of corpus callosum "bend" at front of corpus callosum

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a-h

a. interventricular foramen
b. hypothalamus
c. thalamus
d. third ventricle
e. midbrain
f. pons
g. fourth ventricle
h. vermis of cerebellum

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i-m

i. cerebellar tonsil
j. medulla
k. anterior commissure
l. lamina terminalis

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a-i

a. CN II optic
b. CN III oculomotor
c. CN V trigeminal
d. CN VI abducens
e. CN VII facial
f. CN VIII vestibulocochlear
g. CN XI accessory
h. CN XII hypoglossal
i. CN X vagus
j. CN IX glossopharyngeal
k. CN XII hypoglossal
l. Pyramid
m. Olive
o. CN IV trochlear
p. Optic tract
q. Optic chiasm

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j-q

j. CN IX glossopharyngeal
k. CN XII hypoglossal
l. Pyramid
m. Olive
o. CN IV trochlear
p. Optic tract
q. Optic chiasm

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a. telencephalon
b. diencephalon
c. mesencephalon
d. myelencephalon
e. metencephalon

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a-g

a. anterior cerebral artery
b. optic chiasm
c. infundibulum
d. mammilary body
e. posterior communicating artery
f. superior cerebellar artery
g. basilar artery

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i-n

i. cerebellar tonsil
j. medulla
k. anterior commissure: bundle of axons that connects structures on either side
l. lamina terminalis: last wall, used to be front of brain
m. corpora quadrigemina (tectum): roof of portin of brain, above aqueduct
n. cerebral aqueduct

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j-q

j. CN IX glossopharyngeal
k. CN XII hypoglossal
l. Pyramid
m. Olive
o. CN IV trochlear
p. Optic tract
q. Optic chiasm

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h-o

h. trigeminal nerve
i. posterior cerebral artery
j. oculomotor nerve
k. uncus
l. internal carotid artery
m. optic nerve
n. olfactory trigone
o. olfactory tract