The Human Brain During the Third Trimester

GW26 Horizontal

CR 235 mm

Y16-59

Level 3: Section 400

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 (^) v
entri
cle
Late
ral (^) v
entri
cle
Choroid
plexus
Choroid
plexus
Choroid
plexus
Choroid
plexus
Precentral gyrus
Postcentral gyrus
Postcentral sulcus
Lateral Lateral ffissu reissure
Supramarginal gyrus
Angular gyrus
Superior
parietal
lobu le?
Cingu
late g
yrus
Cingu
late (^) g
yrus
Central sulcus
White matter
Layer I
11
22
(^6677)
33
44
P
ar
ac
entra
l
lo
b
u
le
P
ar
ac
entra
l
lo
b
u
le
Interhemispheric fissure
Interhemispheric fissure
Insular
gyrus
Insular
gyrus
88
99
1010
1111
1212
1313
Cau
date
Cau
date
T
h
ala
m
us
T
h
al
a
m
us
Bas
al g
ang
lia
Bas
al g
ang
lia
Int
ern
alc
ap
sul
e
Int
ern
alc
ap
sul
e
Putam
en
Putam
en
SeptumSeptum
FFornixornix
H
ip
po
ca
m
p
us
H
ip
po
ca
m
p
us
Dorsal
complex
Dorsal
complex
Ventral
complex
Ve ntral
complex
P
os
te
ri
or
co
m
pl
ex
P
os
te
ri
or
co
m
pl
ex
Anterior
complex
Anterior
complex
Re
tic
ula
rb
elt
Re
tic
ula
rb
elt
Co
rp
u
s
ca
ll
os
mu
g(
ne
)u
Co
rp
u
s
ca
ll
os
mu
g(
ne
)u
C
ro
up
cs
al
lo
su
m
(s
p
le
ni
u
m
)
C
ro
up
cs
al
lo
su
m
(s
p
le
ni
u
m
)
4 Callosal sling
55
1 Fr ontal neuroepithelium and subventricular zone
Pa rahippocampal neuroepithelium, subventricular
zone, and stratified transitional field
6
2 Fr ontal stratified transitional field
5 Fo rnical glioepithelium
11 Po sterior striatal neuroepithelium and subventricular zone
12 Anterolateral striatal neuroepithelium and subventricular zone
13 Anteromedial striatal neuroepithelium and subventricular zone
14 Strionuclear glioepithelium
15 Subpial granular layer (cortical)
3 Callosal glioepithelium
7 Occipital neuroepithelium and subventricular zone
8 Occipital stratified transitional field
9 Pa rietal neuroepithelium and subventricular zone
10 Pa rietal stratified transitional field
15
1414
Remnants of the germinal matrix, migratory streams, and transitional fields
Pa
rie
tal lo
be
Pa
rie
tal lo
be
An
teri
or (^) l
imb
An
teri
or (^) l
imb
Po
ste
rio
r^ l
im
b
Po
ste
rio
r^ l
im
b

O

cc

ip

ita

llobe

O

cc

ip

ita

llobe

See detail of brain core

in Plates 230A and B.

C

in

ug

la

et

g^

yr

su

R

te

or

sp

le

in

la

(^) a
er
a
C
in
ug
la
et
g^
yr
su
R
te
or
sp
le
in
la
(^) a
er
a
PLATE 218