The Human Brain During the Third Trimester

GW26 Horizontal

CR 235 mm

Y16-59

Level 4: Section 460

Tem

pora

l lob

e

Tem

pora

l lob

e

Frontal

lobe

Frontal

lobe

Occipital

lobe

Occipital

lobe

Cortical plate

Superior and middle

frontal gyri

Internal capsule (anterior limb)

Cingulum

Stria terminalis

Claustrum

External capsule

Internal capsule (posterior limb)

La

ter

al

ven

tri

cle

La

ter

al

ven

tri

cle

Late

ral^

vent

ricle

Late

ral^

vent

ricle

Choroid

plexus

Choroid

plexus

Choroid plexus

Parahippocampal

gyrus

Retrosplenial

cortex

Precentral gyrus

Postcentral gyrus

Lateral fissure Angular gyrus

Occipital

gyri

Superior temporal gyrus

Cingulate gyrusCingulate gyrus

Central sulcus

White matter

11

22

66

77

99

1010

16

1515

1313

1414

1212

1111

55

33

44

P

ar

ac

entrall

ob

u

P le

ar

ac

entrall

ob

u

le

Interhemispheric fissure

Interhemispheric fissure

Insular

gyrus

Insular

gyrus

88

Cau

date

Cau

date

T

ha

la

m

us

T

ha

la

m

us

Ba

sa

l (^) g
an
gl
ia
Ba
sa
l (^) g
an
gl
ia
In
ter
na
lc
ap
su
le
In
ter
na
lc
ap
su
le
Puta
men
Puta
men
SeptumSeptum
FFornixornix
H
ip
po
ca
m
pu
s
H
ip
po
ca
m
pu
s
Dorsal
complex
Dorsal
complex
Ve
nt
ral
(^) co
mp
lex
Ve
nt
ral
(^) co
mp
lex
P
os
te
ri
or
co
m
p
le
x
P
os
te
ri
or
co
m
p
le
x
Anterior
complex
Anterior
complex
Re
tic
ula
rb
elt
Re
tic
ula
rb
elt
C
or
pu
s
ca
llo
us
m
g(
ne
)u
C
or
pu
s
ca
llo
us
m
g(
ne
)u
Ce
nt
ra
lco
mple
x
Ce
nt
ra
lco
mple
x
Habenula
Gl
obu
s
pa
llid
Globus
us
pa
llid
us
Third ve ntricle
1 Fr ontal neuroepithelium and subventricular zone
Pa rahippocampal neuroepithelium, subventricular
zone, and stratified transitional field
5
2 Fr ontal stratified transitional field
4 Fo rnical glioepithelium
13 Anterolateral striatal neuroepithelium and subventricular zone
14 Anteromedial striatal neuroepithelium and subventricular zone
15 Strionuclear glioepithelium
12 Po sterior striatal neuroepithelium and subventricular zone
10 Alve ar glioepithelium
11 Subgranular zone (dentate)
16 Subpial granular layer (cortical)
3 Callosal glioepithelium
6 Occipital neuroepithelium and subventricular zone
7 Occipital stratified transitional field
8 Te mporal neuroepithelium and subventricular zone
9 Te mporal stratified transitional field
Remnants of the germinal matrix, migratory streams, and transitional fields
Layer I
Par
ieta
l lob
e
Par
ieta
l lob
e
An
teri
or (^) l
imb
An
teri
or (^) l
imb
Po
ste
rio
r^ li
mb
Po
ste
rio
r^ li
mb
See detail of brain core
in Plates 231A and B.
PLATE 219