External Structures of the Brain

dura mater

thicker covering/outer layer

arachnoid mater

webby transluscent layer

pia mater

deepest layer/smooth

longitudinal fissure

separates left and right hemispheres of the cerebrum

transverse fissure

separates cerebrum from cerebellum

hemispheres of the cerebrum

left and right

frontal lobe

frontal pole

temporal lobe

temporal pole

parietal lobe

occipital lobe

occipital pole

lateral sulcus

central sulcus

precentral gyrus

in front of the central sulcus (more anterior)

postcentral gyrus

behind the central sulcus (more posterior)

spinal cord

cerebellum

vermis

divides cerebellum in half

hemispheres of the cerebellum

olfactory bulb

olfactory tract

optic nerve

top part of X structure (more anterior)

optic chiasm

middle of the X structure

optic tract

bottom of X structure (more posterior)

mammillary bodies