The Human Brain During the Third Trimester

PLATE 72

GW37 Horizontal

CR 320 mm

Y301-62

Level 8: Section 801

10 mm

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

8 Occipital stratified transitional field

4 Callosal glioepithelium

15

Accumbent neuroepithelium and subventricular zone

(infiltrated by the rostral migratory stream)

14 Po sterior striatal neuroepithelium and subventricular zone

5 Fo rnical glioepithelium

6

Pa rahippocampal neuroepithelium, subventricular

zone and stratified transitional field

7 Occipital neuroepithelium and subventricular zone

9 Te mporal neuroepithelium and subventricular zone

10 Te mporal stratified transitional field

11 Alve ar glioepithelium

12 Subgranular zone (dentate)

13 Lateral migratory stream (cortical)

(^13131414)
1515
Primary visual cortex
Third Third ventricleventricle
Lateral fissure
Middle frontal gyrus
Inferior frontal gyrus
Frontal
lobe
Frontal
lobe
Superior frontal gyrus Subcallosal
area
Subcallosal
area
HYPO-
THALAMUS
HYPO-
THALAMUS
PREOPTIC AREA
Nucleus
accumbens
Nucleus
accumbens
Insular^ gy
rus
Insular^ gy
rus
Para-
hippocampal
gyrus
Para -
hippocampal
gyrus
Lateral
ventricle
Lateral
ventricle
Basal^ gan
glia
Basal^ gan
glia
Superior temporal gyrus Middle temporal gyrus
Calcarine
sulcus
Calcarine
sulcus
Interhemispheric fissure
Occipital
lobe
Occipital
lobe
THALAMUSTHALAMUS
FFornixornix
Corpus
callosum
(rostrum)
Corpus
callosum
(rostrum)
11
22
66
55
33
44
77
88
1010
1111
1212
99
Layer I
Cortical plate
White matter
Temporal
lobe
Te mporal
lobe
HippocampusHippocampus
Superior
colliculus
Superior
colliculus
Cerebral
aqueduct
Cere bral
aqueduct
See detail of brain core
in Plates 86A and B.
MIDBRAIMIDBRAINN
TTectuectumm