The Human Brain During the Third Trimester

GW37 Sagittal

CR 310 mm

Y180-61

Level 8: Section 501

Inferior

frontal gyrus

Superior temporal gyrus?

Hi

pp

oc

am

pu

s

Hi

pp

oc

am

pu

s

Cerebellum

(hemisphere)

Cere bellum

(hemisphere )

Supramarginal gyrus

Postcentral sulcus

Postcentral gyrus

Precentral gyrus Central sulcus

Precentral sulcus

Paracentral

lobule

Paracentral

lobu le

B

a

sa

l^ g

a

ng

li

a

B

a

sa

l^ g

a

ng

li

a

Am

yg

da

la

Am

yg

da

la

Primary olfactory cortex (Piriform)

Entorhinalc

orte

x

Entorhinalc

orte

x

Parahippocampal

gyrus

Occipital

lobe

Occipital

lobe

Pa

rie

ta

l (^) l
ob
e
Pa
rie
ta
l (^) l
ob
e
Fr
ontal lobe
Fr
ontal lobe
Middle frontal gyrus
Orbital
gyri
Lateral Lateral ffissu reissure
ClaustruClaustrumm
ExterExternal capsulnal capsulee
In
su
lar
gy
ru
s
In
su
lar
gy
ru
s
Lateral
ventricle
Lateral
ventricle
Occipital
gyri
Inte
rna
lc
ap
su
le
Inte
rna
lc
ap
su
le
Damaged areas in section
See detail of brain core and
cerebellum in Plates 62A and B.
1
Pa rietal neuroepithelium, subventricular zone,
and stratified transitional field
2
Occipital neuroepithelium, subventricular zone,
and stratified transitional field
4 Alve ar glioepithelium
5 Subgranular zone (dentate)
3
Pa rahippocampal neuroepithelium, subventricular zone,
and stratified transitional field
6 Lateral migratory stream (cortical)
9 Strionuclear glioepithelium
Remnants of the germinal matrix, migratory streams, and transitional fields
10 External germinal layer (cerebellum)
7 Amygdaloid glioepithelium/ependyma
8 Po sterior striatal neuroepithelium and subventricular zone
11 Subpial granular layer (cortical)
LLiinngguullaa
Parieto-
occipital
sulcus
Calcarine fissure
CCuunneeuuss
Angular gyrus
11
99
10
11
22
33
44
66
77
88
55
Cortical plate
White matter
Layer I
PLATE 54