The Human Brain During the Third Trimester

GW29 Coronal

CR 260 mm

Y14-59

Level 13: Section 1101

Precentral gyrus

Postcentral gyrus

Supramarginal

gyrus

Cingulate

gyrus

Cingulum

Induseum

griseum

External capsule

Transpontine corticofugal tract

Pontine gray

Middle cerebellar peduncle

Nerve V

Pontocerebellar fibers (decussation)

Superior cerebellar peduncle

Medial lemniscus

Reticular tegmental nucleus

Raphe nuclear complex

Brachium of the

inferior colliculus

Pr

etectum

Pr

etectum

Interhemi-

spheric fissure

Parietal

lobe

Parietal

lobe

Temporal

lobe

Te mporal

lobe

Central sulcus (fusing)

ThalamusThalamus

FFornixornix

Lateral vLateral ventriclentriclee

CorCorpus callosupus callosumm

Caudate

(head)

Caudate

(head)

In

te

rn

al

c

ap

su

le

In

te

rn

al

c

ap

su

le

Stria

terminalis

Stria

terminalis

Oculomotor

nuclear complex

Oculomotor

nuclear complex

Lateral

geniculate

body

Lateral

geniculate

body

PPonsons

MidbraiMidbrainn

Dentate

gyrus

Dentate

gyrus

SSuubbiiccuulluumm

Medial

geniculate

body

Medial

geniculate

body

Ammon's

horn

Ammon's

horn

Cerebral

aqueduct

Cere bral

aqueduct

TTe gmentumegmentum

PutamenPutamen

Central

gray

Central

gray

Subcom-

missural

organ

Subcom-

missural

organ

Trochlear

nuc. (IV)

Tr ochlear

nuc. (IV)

Para-

hippocampal

gyrus

Para-

hippocampal

gyrus

1 Pa racentral/parietal neuroepithelium and subventricular zone

2 Pa racentral/parietal stratified transitional field

12 Subpial granular layer (cortical)

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

Posterior

complex

Po sterior

complex

Dorsal

complex

Dorsal

complex

Reticular

belt

Reticular

belt

33

11

22

44

44

55

66

88

99

77

12

1111 1010

Lateral fissure

Layer I

Cortical plate

White matter

12

7 Subgranular zone (dentate)

Hippo-

campus

Hippo-

campus

See detail of brain core

in Plates 184A and B.

Pa rahippocampal neuroepithelium, subventricular zone,

and stratified transitional field

8

4 Po sterior striatal neuroepithelium and subventricular zone

5 Strionuclear glioepithelium

Paracentral

lobule

Paracentral

lobu le

11 Mesencephalic glioepithelium/ependyma

Caudate

(tail)

Caudate

(tail)

Superior

temporal gyrus

Middle

temporal gyrus

Inferior

temporal gyrus

Fusiform

gyrus

Fusiform

gyrus

Lateral Lateral ventricleventricle

Damaged areas in section

PLATE 163