The Human Brain During the Third Trimester

GW29 Coronal

CR 260 mm

Y14-59

Level 12: Section 1061

Precentral gyrus

Postcentral gyrus

Supramarginal

gyrus

Cingulate

gyrus

Cingulum

Induseum

griseum

Basal

ganglia

Basal

ganglia

Transpontine corticofugal tract

Pontine gray

Reticular tegmental nucleus

Raphe nuclear complex

Raphe nuclear complex

Medial lemniscus

Middle cerebellar peduncle

Pontocerebellar fibers (decussation)

Interhemispheric fissure

Parietal

lobe

Parietal

lobe

Temporal

lobe

Te mporal

lobe

Central sulcus

ThalamusThalamus

Third ve ntricle

(pineal recess)

FFornixornix

Optic

tract

Optic

tract

Lateral Lateral ventriclventriclee

CorCorpus callosupus callosumm

Caudate

(tail)

Caudate

(tail)

Caudate

(tail)

Caudate

(tail)

Internal

capsule

Internal

capsule

Stria

terminalis

Stria

terminalis

Central

gray

Central

gray

Cerebral

aqueduct

Cere bral

aqueduct

Posterior

commissure

Po sterior

commissure

Oculomotor

nuclear complex

Oculomotor

nuclear complex

Lateral

geniculate

body

Lateral

geniculate

body

PPonsons

nE

ot

hr

in

al

co

rte

x

nE

ot

hr

in

al

co

rte

x

Superior cere-

bellar peduncle

(decussation)

Superior cere-

bellar peduncle

(decussation)

Midbrain

tegmentum

Midbrain

tegmentum

Dentate

gyrus

Dentate

gyrus SSuubbiiccuulluumm

A

m

m

on

's

ho

rn

A

m

m

on

's

ho

rn

Medial

geniculate

body

Medial

geniculate

body

Parahip-

pocampal

gyrus

Parahip-

pocampal

gyrus

ExterExternal capsulnal capsulee

PutamenPutamen

PrPretectuetectumm

Cerebral peduncle

Lateral Lateral ventricleventricle

Ventral

complex

Ve ntral

complex

Dorsal

complex

Dorsal

complex

33

11

22

44

44

55

66

88 99

77

1010

12

1111

Lateral fissure

Layer I

Cortical plate

White matter

Hippo-

campus

Hippo-

campus

1 Pa racentral/parietal neuroepithelium and subventricular zone

2 Pa racentral/parietal stratified transitional field

12 Subpial granular layer (cortical)

11 Mesencephalic glioepithelium/ependyma

10 Te mporal stratified transitional field

9 Te mporal neuroepithelium and subventricular zone

6 Alve ar glioepithelium

3 Callosal glioepithelium

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

Reticular

belt

Reticular

belt

4 Po sterior striatal neuroepithelium and subventricular zone

7 Subgranular zone (dentate)

5 Strionuclear glioepithelium

Pa rahippocampal neuroepithelium, subventricular zone,

and stratified transitional field

8

See detail of brain core

in Plates 183A and B.

Paracentral

lobule

Paracentral

lobu le

Superior

temporal gyrus

Middle

temporal gyrus

Inferior

temporal gyrus

Fusiform gyrus

PLATE 162