Neuroanatomy Lab (Week 4) Flashcards Preview

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Flashcards in Neuroanatomy Lab (Week 4) Deck (18):
1


Layers from cortex down to lateral ventricle (top to bottom)


Cererbal cortex

Cingulate sulcus (also has marginal branch posterior and perpendicular)

Cingulate gyrus

Cingulum

Corpus callosum (genu, rostral, splenium)

Lateral ventricle

2


Cingulum


Large cortical association tract going from frontal to temporal lobe and sending fibers to cingulate gyrus along its course

3


What can you see if you look into the lateral ventricle from the top?


Fornix

Caudate

Choroid plexus of 3rd and lateral ventricles

Thalamus

Septum pellucidum (medially)

4


Commissures that connect similar regions of the brain on each side


Corpus callosum

Anterior commissure

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)

5


Lamina terminalis


Rostral wall of 3rd ventricle

Right next to anterior commissure?

6


What runs between the caudate and the thalamus?


Stria terminalis (from amygdaloid complex to hypothalamus; lateral to columns of fornix)

Thalamostriate (terminal) vein

7


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

8


Hypothalamus


Part of diencephalon

Contains mammillary body

Regions of hypothalamus are suprachiasmatic, infundibular, and supramammillary based on what's around it

9


2 structures just caudal to mesodiencephalic junction


Red nucleus

Substantia nigra

10


Tectum


 Region dorsal to level of cerebral aqueduct (aqueduct of Sylvius)

Made up of superior and inferior colliculi

11


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

12


Going from lateral to medial, layers under insular cortex


Insular cortex

Extreme capsule (white matter)

Claustrum (gray matter)

External capsule (white matter)

Putamen (thick, gray)

Globus pallidus

Internal capsule

Thalamus

13


Where is the basal forebrain?


Ventral to anterior commissure (under, on coronal section)

Remember, this includes the basal nucleus with ACh containing cells

14


C-shaped structures in the brain


1) Caudate

2) Corpus callosum

3) Fornix

15


At rostral levels, what is the caudate continuous with?


Nucleus accumbens (ventral to caudate)

Putamen (lateral to caudate)

16


Internal capsule


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)

17


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

18


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

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