The Human Brain During the Third Trimester

PLATE 67

GW37 Horizontal

CR 320 mm

Y301-62

Level 3: Section 531

10 mm

Lateral fissure

Middle frontal gyrus

Inferior frontal gyrus

Frontal

lobe

Frontal

lobe

Pari

etal (^) lo
be
Pari
etal (^) lo
be
Superior frontal gyrus
Precentral gyrus
Postcentral gyrus
Cingulate gyrusCingulate gyrus
Insular gyrusInsular gyrus
Cingulate g. (retrosplenial area)
PrPrecuneusecuneus
Lateral
ventricle
Lateral
ventricle Ba
sal
gan
glia
Ba
sal
gan
glia
Supramarginal gyrus
Angular gyrus
Central sulcus
Inter
nal^ ca
psule
Inter
nal^ ca
psule
Precentral sulcus
Interhemispheric Interhemispheric ffissureissure Cuneus
Occipital
lobe
Occipital
T lobe

H

AL

AM

US

TH

AL

AM

US

Fo

rn

ix

Fo

rn

ix

Par

ace

ntra

l

lobu

Para le

centr

al

lobu

le

CingulumCingulum

Remnants of the germinal matrix, migratory streams, and transitional fields

11

22

66

66

55

55

33

44

44

77

88

99

1111

1212

1010

2 Fr ontal neuroepithelium and subventricular zone

1 Rostral migratory stream (source area)

3 Fr ontal stratified transitional field

4 Callosal glioepithelium 10 Anterolateral striatal neuroepithelium and subventricular zone

11 Anteromedial striatal neuroepithelium and subventricular zone

9 Po sterior striatal neuroepithelium and subventricular zone

12 Strionuclear glioepithelium

5 Callosal sling

6 Fo rnical glioepithelium

7 Pa rietal neuroepithelium and subventricular zone

8 Pa rietal stratified transitional field

Spleniu

m

Spleniu

GenuGenu m

Cor

puscal

losum

Cor

puscal

losum

Parieto-

occipital

sulcus

Layer I

Cortical plate

White matter

See detail of brain core

in Plates 81A and B.