NSCI 311 cerebrum + cerebral cortex anatomy

A

Superior sagittal sinus: outer border of falx cerebri (attached)

B

inferior sagittal sinus: inner border of falx cerebri (free)

C

straight sinus: junction of falx cerebri and tentorium cerebelli

D

confluence of sinuses (where all sinuses come tgt): junction of falx cerebri, tentorium cerebelli and falx cerebelli

E

occipital sinus: outer border of falx cerebelli (attached)

F

transverse sinus and sigmoid sinus: form deep grooves on interior surfaces of occipital, parietal and temporal bones; drain into internal jugular vein IJV) 

G

cavernous sinus: venous plexus on either side of sella turcica

H

Sella turcica: where pituitary gland sits

!

internal carotid artery (s-shaped)

@

CN III: oculomotor

#

CN IV: trochlear

$

CN V1: ophthalmic branch of trigeminal nerve

%

CN V2: maxillary branch of trigeminal nerve

^

CN VI: abducens

&

optic chiasm

*

pituitary gland

1

lateral ventricles (1st and 2nd in each cerebral hemisphere)

2

interventricular foramina: connect lateral ventricles to 3rd ventricle

3

3rd ventricle: midline structure between diencephalon on each side

4

cerebral aqueduct: connects 3rd and 4th ventricles

5

4th ventricle: between cerebellum and brainstem

6

lateral apertures (2) and median aperture (1): connect 4th ventricle to subarachnoid space

7

central canal: in caudal medulla and SC

primary motor cortex

pre-central gyrus: between central and pre-central sulcus

primary gustatory cortex

anterior insula

primary olfactory cortex

uncus (close to amygdala) - rostral parahippocampal gyrus

primary somatosensory cortex

post-central gyrus: between central and post-central sulcus

primary visual cortex

in and around calcarine sulcus/fissure

primary auditory cortex

central superior temporal gyrus and transverse temporal gyri (inside lateral fissure)

red tract

association fibers: connect areas within the same cerebral hemisphere

green tract

• commissural fibers: corpus callosum 

• connect areas across hemispheres

• signals going thru r mostly inhibitory 

purple tract

• projection fibers: corona radiata and internal capsule

• connect cerebral cortex and subcortical structures of CNS

red

superior longitudinal fasciculus

dark yellow

arcuate fasciculus

big green

inferior fronto-occipital fasciculus

small green

uncinate fasciculus

purple

cingulum

indigo

corpus callosum

yellow

internal capsule

pink

arcuate fibers

powdery blue

• anterior cerbral artery (ACA)

• medial aspect of frontal and parietal lobes

powdery yellow

• middle cerebral artery (MCA)

• vast majority of lateral cortex

• frontal pole of temporal lobe

powdery red

• posterior cerebral artery (PCA)

• entire occipital lobe

• medial and inferior aspects of temporal lobe

neon pink

short association fibers (arcuate)

cyan

superior longitudinal fasciculus

neon green

inferior fronto-occipital fasciculus

neon red

uncinate fasciculus

neon yellow

projection fibers

light blue

above calcarine sulcus

dark blue

below calcarine sulcus

light yellow

above calcarine sulcus

dark yellow

below calcarine sulcus

pink visual

parietal optic radiations

green visual

temporal optic radiations

red visual

parietal optic radiations

purple visual

temporal optic radiations

grey

optic nerve

brown

optic chiasm

black

• optic tract

• without it: depth perception is impaired

• misalignment between what each eye sees

dark green

LGN of thalamus