The Human Brain During the Third Trimester

PLATE 70

GW37 Horizontal

CR 320 mm

Y301-62

Level 6: Section 731

10 mm

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

2 Fr ontal neuroepithelium and subventricular zone

3 Fr ontal stratified transitional field

7 Occipital stratified transitional field

4 Callosal glioepithelium

14 Strionuclear glioepithelium

11 Po sterior striatal neuroepithelium and subventricular zone

5 Fo rnical glioepithelium

6 Occipital neuroepithelium and subventricular zone

8 Pa rietal/temporal neuroepithelium and subventricular zone

9 Pa rietal/temporal stratified transitional field

10 Alve ar glioepithelium

15 Septal glioepithelium/ependyma

Third vThird ventricleentricle Primary visual cortex

Lateral fissure

Middle frontal gyrus

Inferior frontal gyrus

Frontal

lobe

Frontal

lobe

Parietal

lobe

Parietal

lobe

Superior frontal gyrus Subcallosal

area

Subcallosal

area

Bed nuc. of stria

terminalis

Bed nuc. of stria

terminalis Habenula

Insular gyru

s

Insular gyru

s

Cingulate gyrus

(retrosplenial area)

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?

Calcarine

sulcus

Calcarine

sulcus

Interhemispheric fissure

Occipital

lobe

Occipital

lobe

TTHHAALLAAMMUUSS

FFornixornix

Corpus

callosum

(rostrum)

Corpus

callosum

(rostrum)

(^2211)
66
55
33
44
44
77
88
1010
1111
1212
1515
1313
1414
99
Parieto-occipital
sulcus
Layer I
Cortical plate
White matter
Temporal
lobe
Te mporal
lobe
HippocampusHippocampus
SEPTUM
See detail of brain core
in Plates 84A and B.
1 Rostral migratory stream (source area)
12 Anterolateral striatal neuroepithelium and subventricular zone
13 Anteromedial striatal neuroepithelium and subventricular zone
Damaged areas in section