LANDERS MICROANATOMY

Question 1

this cortex is 6 layered, 4 of 5 lobes and makes up 90% of cortex?

Answer 1

homogenetic cortex

Question 2

no more than 5 non distinguishable layers and makes up about 10% of the cortex?

Answer 2

heterogenetic cortex

Question 3

the majority of these cortical regions are more recent from an evolutionary context and contain six layers

Answer 3

homotypical cortex

Question 4

what are the six layers of the homotypical cortex?

which ones are input, ones for output?

Answer 4

molecular layer
external granular layer
external pyramidal layer
internal granular layer
internal pyramidal layer
multiform layer

Question 5

in the cortical fiber tract, what are the afferent (input) pathways?

efferent pathways

Answer 5

corticocortical
thalmocortical
forebrain
locus ceruleus
raphe nuclei

association fibers
commissural fibers
projection fibers

Question 6

this cortical efferent pathway travels anteriorly to posteriorly and can be short gyrus to gyrus or can be long lobe to lobe

i.e.
superior longitudinal fasiciulus (frontal to occipital)

inferior longitudinal fasiculus (temporal to occipital)

arcuate fasiculus (Broca to Wernickes)

uncinate fasiculus (Frontal to anterior temporal)
cingulum (cingulate to hippocampal)

Answer 6

association fibers

Question 7

this cortical efferent pathway travel from one side to the other

i.e.
corpus callosum

anterior commisure

posterior commissure

Answer 7

commissural fibers

Question 8

this cortical efferent pathway connects cerebral cortex to subcortical regions and subcortical regions tot he cerebral cortex

i.e.
corticospinal tract (connects cortex to spinal cord)

corticobular tract (cortex to brainstem)

corticopontine (cerebral cortex to cerebellum via pon)

corticostriate tract (cerebral cortex to basal nuclei)

thalmocortical tract (cerebral cortex to thalamus)

Answer 8

projection fibers