The Human Brain During the Third Trimester

GW29 Coronal

CR 260 mm

Y14-59

Level 20: Section 1621

Precuneus

CuneusCuneus

Lingula?Lingula?

Angular gyrus

Interhemi-

spheric fissure

Calcarine

fissure

Primary

visual

cortex

Parietal

lobe

Parietal

lobe

Occipital

lobe

Occipital

lobe

Lateral

ventricle

(occipital

recess)

Occipital gyri

Cere bellum

(hemisphere )

K

K

See the primary visual cortex

from a nearby section

in Plate 174.

Layer I

Cortical plate

White matter

1 Pa rietal neuroepithelium and subventricular zone

2 Pa rietal stratified transitional field

3 Occipital neuroepithelium and subventricular zone

5 External germinal layer (cerebellum)

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

4 Occipital stratified transitional field

33

33

11

22

44

44

Parieto-occipital sulcus

Parieto-

occipital sulcus

Parieto-

occipital sulcus

5

6

6 Subpial granular layer (cortical)

PLATE 170