The Human Brain During the Third Trimester

PLATE 68

GW37 Horizontal

CR 320 mm

Y301-62

Level 4: Section 561

10 mm

Lateral fissure

Middle frontal gyrus

Inferior frontal gyrus

Frontal

lobe

Frontal

lobe

Parietal

lobe

Parietal

lobe

Te

m

po

ra

l

lo

be

Te

m

po

ra

l

lo

be

Superior frontal gyrus

Precentral gyrus

Postcentral gyrus

Cingulate

gyrus

Cingulate

gyrus

Insular^ g

yrus

Insular^ g

yrus

Cingulate gyrus (retrosplenial area)

PrPrecuneusecuneus

Lateral

ventricle

Lateral

ventricle

Lateral

ventricle

Lateral

ventricle

B

as

al

g

an

gl

ia

B

as

al

g

an

gl

ia

Superior temporal gyrus

Supramarginal gyrus?

Supramarginal gyrus?

Angular gyrus

Central sulcus

Int

ern

al c

aps

ule

Int

ern

al^ c

aps

ule

Precentral sulcus

CuneusCuneus

Interhemispheric Interhemispheric ffissureissure

Occipital

lobe

Occipital

TTHHAALLAAMMUUSS lobe

oF

nr

ix

oF

nr

ix

Para

cent

ral

lobu

Pa le

race

ntra

l

lobu

le

CingulumCingulum

11

22

66

66

55 55

33

44

44

77

88

99

1010

1111

1212

S

lep

n

iu

m

S

lep

n

iu

GenuGenu m

Co

rpu

scallos

um

Co

rpu

scallos

um

Parieto-

occipital

sulcus

Layer I

Cortical plate

White matter

Co

rpu

sca

llos

um

Co

rpu

sca

llos

um

See detail of brain core

in Plates 82A and B.

FFornixornix

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