The Human Brain During the Third Trimester

FrFrontal lobeontal lobe

Basal gangliaBasal ganglia

InterInternal capsulnal capsulee

Corpus

callosum

Corpus

callosum

Cingulate

gyrus

Cingulate

gyrus

Cingulate

gyrus

Cingulate

gyrus

P

ar

ie

ta

l lo

b

e

P

ar

ie

ta

l lo

b

e

Superior

frontal

gyrus

Middle frontal gyrus

Precentral gyrus

Postcentral gyrus

Superior parietal

lobu le

Angular gyrus

Supramarginal gyrus

Central sulcus

Induseum

griseum

Interhemispheric fissure Induseum griseum

C

or

pu

sc

allos

um

C

or

pu

sc

allos

um

Choroid

plexus

Choroid

plexus

La

ter

alv

entricle

La

ter

alv

entricle

GW30 Horizontal

CR 260 mm

Y187-65

Level 2: Section 400

1 Fr ontal neuroepithelium and subventricular zone

2 Fr ontal stratified transitional field

3 Callosal glioepithelium

4 Callosal sling

5 Fo rnical glioepithelium

8 Po sterior striatal neuroepithelium and subventricular zone

10 Anteromedial striatal neuroepithelium and subventricular zone

9 Anterolateral striatal neuroepithelium and subventricular zone

11 Strionuclear glioepithelium

6 Pa rietal neuroepithelium and subventricular zone 12 Subpial granular layer (cortical)

7 Pa rietal stratified transitional field

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

Layer I

Cortical plate

White matter

11

22

66

77

55

33

33

44

88

99

11

1010

12

1111

Fornix

Stria terminalisStria terminalis

Precuneus

PParacentral lobulearacentral lobule

PLATE 113