Neuro 45: Cerebral Cortex

Front 1

describe the arterior supply to the cerebral cortex

Back 1

ACA, MCA, PCA, ant comm, post comm (Cicle of Willis)

Front 2

describe the venous drainage of the cerebral cortex

Back 2

superior saggital sinus=>inferior saggital sinus=>straight sinus=>tranverse sinus=>sigmoid sinus=>internal jugular veins

Front 3

list the 6 layers of the neocortex

Back 3

1.molecular
2. external granule
3. external pyramida
4. internal granular -input from thalamus
5. internal pyramidal-Betz cells, output
6. multiform layer

Front 4

in which layer of the neocortex would you expect to find association and commisural fibers but no projection fibers

Back 4

layer 2: external pyramidal layer (note that the multiform layer contains these fibers but has has projection and corticothalamic fibers)

Front 5

in which layer of the neocortex would you expect to find the majority of the input thalamocortical fibers of the ventral tier

Back 5

layer 4: internal granular

Front 6

In which layer of the neocortex would you expect to find cortico fibers that project to lower motor areas (betz cells)

Back 6

layer 5, internal pyramidal
(hint roman numberal V looks kinda like an upside down pyramid, pyramidal cells project down to LMN)

Front 7

what is the functional unit of the cerebral cortex

Back 7

colums and modules-each column extends through the 6 layers that share similar functions, functional columns for modules in various cortocal areas, the columns are interconnceted within the same and between hemispheres

Front 8

Primary somatosensory-anatomic and bordmann's

Back 8

1 somatosensory=postcentral gyurs, 3,1,2

Front 9

Primary motor-anatomic and bordmann's

Back 9

1 motor=precentral gyrus, 4

Front 10

primary visual-anatomic and bordmann's

Back 10

1 visual=cuneus and lingual gyrus, area 17

Front 11

auditory-anatomic and bordmann's

Back 11

tranverse gyrui of Heschl, 41,42

Front 12

brocas-anatomic and bordmann's

Back 12

inferior frontal gyrus, 44,45

Front 13

which areas of the thalamus connect to the post central gyrus

Back 13

The post central gyrus is the primary sensory cortex (3,1,2)
VPM, VPL these nuceli are the terminations of the dorsal column/ medial lemniscus/ spinothalamic and trigeminal systems that convery fine touch and pain/temp from the body and face

Front 14

which areas of the thalamus connect to the precentral gyrus

Back 14

motor relays, VA-input from globus pallidus of BG, VL-input from dentate n. of cerebellum

Front 15

Which areas of the thalamus project to the cuenus and lingual gyri

Back 15

lateral geniculate body-input from the retinal ganglion cells
the cuneus and lingual gyri are the primary visual cortex

Front 16

Which areas of the thalamus project to the transverse gyri of heschel

Back 16

medial geniculate n. - input from inferior colliculus

The T.G. of H (41,42) is the primary auditory cortex

Front 17

Which areas of the thalamus project to teh POT cortex

Back 17

pulvinar, LP-sensory integration

Front 18

which areas of the thalamus project  to the prefrontal cortex

Back 18

medial dorsal n. function in executive and limbic fxns

Front 19

which areas of the thalamus project to the cingulate gyrus

Back 19

anterior nuclear gorup -limbic, (mamillary=> cingulate, papez circut)

and lateral dorsal-emotional expression, (cingulate=>cingulate)

Front 20

tumors in the cerebral cortex are usually of which cell origin

Back 20

glial

Front 21

lesion of the supramarginal gyrus results in

Back 21

asteroegnosis-a portion of the parietal lobe, inability to tell the identity of an object by feel

Front 22

lesion of the angular gyrus reslts in

Back 22

alexia and agraphia