sectional forebrain anatomy self-study lab

T1

through top of lateral ventricle and corpus callosum

T2

through thalamus and basal ganglia

T3

through anterior commissure and superior midbrain

lentiform nucleus, insula, putamen, globus pallidus

thalamus in middle is flanked laterally by the _____ ____, which is just deep to the _____. It includes the lateral _____ and the medial _______ _____

caudate nucleus, head, tail

in wall of lateral ventricle, a part of the basal ganglia. Has a ____ in the wall of the anterior horn and a _____ in the inferior horn

thalamus, anterior, lateral, medial

on either side of IIII with an internal lamina separating it into three regions:

internal capsule, boomerang, anterior limb, genu, posterior limb

white matter bundle between thalamus and basal ganglia - shaped like a ____ in horizontal cross section. Has three parts: _____ ____, ____, ____ _____

anterior limb of internal capsule

descending fronto-pontine fibers - major input to cerebellum

genu of internal capsule

descending corticobulbar fibers to brainstem motor nuclei

posterior limb of internal capsule, anterior, posterior

descending corticospinal fibers - UMNs running to alpha motor neurons in ventral horn of spinal cord - arm is ____, leg is _____. also contains other corticopontine fibers

medial, lateral

orientation of corticopontine fibers in cerebral peduncles - head is _____, leg is _______

corpus callosum, genu, splenium

commissural fibers linking left and right - forms an arc - anterior part: ____, posterior part: _____

external capsule

white matter bundle - cortico-cortial association fibers - same side - on outer side of lentiform nucleus

extreme capsule

cortico-cortical bundle immediately deep to insula

claustrum

between external and extreme capsules - weird, slender area of gray matter. hypothesized role in multisensory integration

optic radiation

pass posterior from posterior limb of internal capsule - connects LGN of thalamus to V1

striatum, anterior limb of the internal capsule

putamen + caudate nucleus - separated by _____ ____ __ ____ ____ _____

lenticulostriate arteries, MCA

supply lentiform nucleus (putamen + globus pallidus), from what major artery?

recurrent artery of Heubner, ACA, anterior limb of internal capsule

supplies head of caudate nucleus, from what major artery. Also supplies what?

anterior choroidal artery, internal carotid artery

supplies genu and posterior limb of internal capsule, from what major artery

PCA

supplies thalamus

C1

through anterior commissure and anterior limb of internal capsule

C2

through hippocampus and mammillary bodies

anterior commissure

separates striatum into dorsal and ventral

anterior choroidal artery

irrigates innermost part of globus pallidus, most of the posterior limb of the internal capsule, and the hippocampus

T1

myelin is bright - show anatomical features but not lesions

T2

myelin is dark, lesions and CSF show up as bright

FLAIR

type of T2 where CSF is rendered dark - lesions are distinct from CSF

corpus callosum genu, lateral ventricle, corpus callosum splenium

optic radiation

corpus callosum genu, caudate nucleus head, corpus striatum, insular cortex, putamen, globus pallidus, thalamus, caudate nucleus tail, corpus callosum splenium, lateral ventricle anterior horn, external capsule, extreme capsule, claustrum, internal capsule, lateral ventricle inferior horn, III

caudate nucleus head, septum pellucidum, lateral fissure, optic radiation, fornix, III, extreme capsule, external capsule

Heubner’s artery, caudate nucleus head, anterior limb of internal capsule, ACA A2

ACA, ACA deep (Heubner), MCA superior, MCA deep (lenticulostriate), AChA, MCA inferior, PCA deep, PCA

substantia nigra, hippocampal formation, cerebellum, cerebral aqueduct, red nucleus, lateral ventricle inferior horn, anterior commissure

caudate-putamen, globus pallidus, ventral pallidum, ventral striatum

cingulate gyrus, corpus callosum genu, caudate nucleus head, internal capsule anterior limb, putamen, globus pallidus, ventral striatum, ventral pallidum, optic nerves, anterior commissure

caudate, putamen, globus pallidus, thalamus

ACA, MCA superior, MCA inferior, MCA deep, PCA, AChA, PCA deep