The Human Brain During the Third Trimester

GW30 Horizontal

CR 260 mm

Y187-65

Level 1: Section 261

P a ra ce nt ral lo

b

u

le P a ra ce nt ral lo

b

u

le

FrFrontal lobeontal lobe

Cingulate gyrusCingulate gyrus

P a rie ta l lo b e

P a rie ta l lo b e Superior frontal gyrus

Middle frontal gyrus

Precentral gyrus Precentral sulcus

Layer I Cortical plate

White matter

Postcentral gyrus

Superior parietal lobu le

Postcental sulcus

Supramarginal gyrus

Angular gyrus

Precuneus

Central sulcus

Interhemispheric fissure

1 Fr ontal subventricular zone

2 Fr ontal stratified transitional field

3 Pa racentral stratified transitional field

6 Cingulate stratified transitional field

4 Pa rietal neuroepithelium and subventricular zone 7 Subpial granular layer (cortical)

5 Pa rietal stratified transitional field

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

11

22

7

66

7

55 33

44

PLATE 112