The Human Brain During the Third Trimester

PLATE 69

GW37 Horizontal

CR 320 mm

Y301-62

Level 5: Section 631

10 mm

Primary

visual

cortex

Third vThird ventricleentricle

SEPTUMSEPTUM

Lateral fissure

Middle frontal gyrus

Inferior frontal gyrus

Frontal

lobe

Frontal

lobe

Parietal

lobe

Parietal

lobe

Superior frontal gyrus

Precentral gyrus

Postcentral gyrus

Cingulate

gyrus

Cingulate

gyrus

Insular^ g

yrus

Insular^ g

yrus

Cingulate gyrus

(retrosplenial ar

ea)

Lateral

ventricle

Lateral

ventricle

Lateral

ventricle

Lateral

ventricl e

B

as

al

g

an

gl

ia

B

as

al

g

an

gl

ia

Superior temporal gyrus

Angular gyrus

Central sulcus

Int

ern

al

ca

ps

ule

Int

ern

al

ca

ps

ule

Precentral sulcus

Calcarine

sulcus

Calcarine

sulcus

Interhemispheric fissure

Occipital

lobe

Occipital

lobe

TTHHAALLAAMMUUSS

FFornixornix

Parace

ntral

lobule

Parace

ntral

lobule

Corpus

callosum

Corpus

callosum

11

22

66

66

55

33

44

44

77

88

99

(^101011111212)
Sp
le
niu
m
Sp
le
niu
m
GenuGenu
Parieto-occipital
sulcus
Layer I
Cortical plate
White matter
Co
rp
us
cal
los
um
Co
rp
us
cal
los
um
Temporal
lobe
Te mporal
lobe
HippocampusHippocampus
See detail of brain core
in Plates 83A and B.
Remnants of the germinal matrix, migratory streams, and transitional fields
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/temporal neuroepithelium and subventricular zone
8 Pa rietal/temporal stratified transitional field