S2: Internal Anatomy of the brain and ventricles Flashcards
what is the roof of this? what forms the floor?

4th ventricle
roof – cerebellum
floor - continuation of the tegmentum into the pons
1
a cavity in these region is caused by what?

anterior horn of lateral ventricle
head of caused by caudate nucleus which lies on the floor of the anterior horn
2

choroid plexus
4

poserior horn of lateral ventricle
6
what causes a hollow on the ventral meidal surface?

inferior (temporal) horn of lateral ventricle
hippocampus
12

interventricular formamen

8

third ventricle

cerebral aqueduct

cerebral aqueduct

lateral ventricle
green circle

third ventricle

4th ventricle

4th ventricle
F

4th ventricle
G

Foramina of Monroe
B

Foramina of Luschka


lateral ventricle

thalamus

head of caudate

putamen
sx of a lesion here?

internal cpasule (posterior limb)
lesions in the posterior limb of the capsule produce dramatic symptoms of sensory loss and paralysis.
the posterior limb carries somatic sensory and motor information from each side of the central sulcus.
(hesclys pyrus sends priojection to mgn from here)

genu of the internal capsule
where does this carry fibers to and from?

internal cpasule (anterior limb)
to and from the frontal lobe

thalamus
what fibers does this carry

internal capsule (posterior limb)
- somatic sensory and motor information from each side of the central sulcus.
- Further posteriorly visual information passes here on the way to the occipital lobes from the LGN in the visual radiations.
- Auditory information to the primary auditory cortex in the superior temporal gyrus from the medial geniculate nucleus (MGN)
4. Most axons descending from the cortex going to the brainstem and spinal cord pass through there

internal capsule (genu)

cadudate nucleus (head)

fornix

insula

hippocampus

septum pellucidum


fornix (columns)

putamen

posterior horn of lateral ventricle

anterior horn of lateral ventricle

globus pallidus

globus pallidus

visual radiations

hippocampus

third ventricle

hypothalamus
purple
input?
output?

lateral geniculate n. (hypothalmus in red) – above the lateral ventricle
input – optic tract
output – visual cortex via optic radiations

amygdala (over lateral geniculate)

hippocampus
what does this carry?

crus cerebri
motor functions going from the cortex to the brain stem and spinal cord

hypothalamus

amygdala

optic tract
purple

pulvinar
(near the lateral geniculate)
purple

medial geniculate
(lateral geniculate in red)

inferior horn of lateral ventricle

pulvinar

putamen

mamilary body/hypothalamus

third ventricle

anterior commisure

corpus callosum

fornix


fornix


LGN

globus pallidus

amygdala


hippocampus

mamillary bodies

fornix

splenium of the corpus callosum

posterior commisure

fornix

Foramen of monroe
connects lateral and third ventricles

pineal gland
sx of tumor here
- paralysis of upward gaze
- weird hypotal. stuff
- hydrocephalus