Layers from cortex down to lateral ventricle (top to bottom)
Cingulate sulcus (also has marginal branch posterior and perpendicular)
Corpus callosum (genu, rostral, splenium)
Large cortical association tract going from frontal to temporal lobe and sending fibers to cingulate gyrus along its course
What can you see if you look into the lateral ventricle from the top?
Choroid plexus of 3rd and lateral ventricles
Septum pellucidum (medially)
Commissures that connect similar regions of the brain on each side
Optic chiasm (decussation bc connects diff regions on 2 sides of the brain)
Interthalamic adhesion (nuclear structure that contains neuron cell bodies, dendrites and axons)
Rostral wall of 3rd ventricle
Right next to anterior commissure?
What runs between the caudate and the thalamus?
Stria terminalis (from amygdaloid complex to hypothalamus; lateral to columns of fornix)
Thalamostriate (terminal) vein
Veins of cerebral cortex
Terminal (thalamostriate), septal and choroidal veins join together to form internal cerebral vein
Internal cerebral vein runs posteriorly to reach great cerebral vein of Galen
Part of diencephalon
Contains mammillary body
Regions of hypothalamus are suprachiasmatic, infundibular, and supramammillary based on what's around it
2 structures just caudal to mesodiencephalic junction
Region dorsal to level of cerebral aqueduct (aqueduct of Sylvius)
Made up of superior and inferior colliculi
What do the brachium of the superior colliculus and brachium of inferior colliculus connect?
Brachium of the superior colliculus connects superior colliculus to lateral geniculate nucleus
Brachium of the inferior colliculus connects inferior colliculus to medial geniculate nucleus
Going from lateral to medial, layers under insular cortex
Extreme capsule (white matter)
Claustrum (gray matter)
External capsule (white matter)
Putamen (thick, gray)
Where is the basal forebrain?
Ventral to anterior commissure (under, on coronal section)
Remember, this includes the basal nucleus with ACh containing cells
C-shaped structures in the brain
2) Corpus callosum
At rostral levels, what is the caudate continuous with?
Nucleus accumbens (ventral to caudate)
Putamen (lateral to caudate)
White matter; major portion of cortical output passes through (both descending and ascending fibers)
Many fibers of internal capsule continue descending into cerebral peduncle
Rostrally (anterior limb) divides caudate and lenticular nucleus (GP and putamen)
Caudally (posterior limb) divides thalamus and lenticular nucleus (GP and putamen)
What are the descending and ascending fibers of the internal capsule?
Descending: from precentral cortex (primary motor cortex) to corticospinal or pyramidal tract
Ascending: somatosensory and visual areas of thalamus to appropriate cortical areas
Blood supply to the brain
From internal carotid: lenticulostriate arteries, middle cerebral artery
From vertebrobasilar circulation: anterior inferior cerebellar artery (AICA), posterior cerebral artery, thalamoperforate branches, superior cerebellar artery