The Human Brain During the Third Trimester

GW26 Horizontal

CR 235 mm

Y16-59

Level 1: Section 240

Pa

rie

tal lo

be

Pa

rie

tal lo

be

Frontal

lobe

Frontal

lobe

Cortical plate

Superior frontal gyrus

LLaatteerraall^ vveennttrriiccllee

Choroid

plexus

Choroid

plexus

Middle frontal gyrus

Precentral gyrus

Postcentral gyrus Supramarginal gyrus

Angular gyrus

Precuneus

Superior

parietal

lobu le

CCi n g u l a t e g y r u si n g u l a t e g y r u s

Central sulcus

White matter

11 11

22

22

66

66

77

8

77

55

55

55

33

33

44

1 Fr ontal neuroepithelium and subventricular zone

2 Fr ontal stratified transitional field

3

Callosal glioepithelium, neuroepithelium, subventricular zone,

and stratified transitional field of the cingulate cortex

6 Pa racentral neuroepithelium and subventricular zone

7 Pa racentral stratified transitional field

4 Pa rietal neuroepithelium and subventricular zone 8 Subpial granular layer (cortical)

5 Pa rietal stratified transitional field

P

ar

ac

entra

l

lo

b

u

le

P

ar

ac

entra

l

lo

b

u

le

Interhemispheric fissure

CCoorrppuuss ccaalllloossuumm

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

Layer I

PLATE 216