The Human Brain During the Third Trimester

Induseum griseum

This section became brittle and

was fractured during staining and

attachment to the slide.

GW37 Coronal

CR 350 mm

Y217-65

Level 12: Section 1021

See detail of brain core

in Plates 38A and B.

Temporal

lobe

Te mporal

lobe

Temporal

lobe

Te mporal

lobe

Induseum griseum

Caudate

(tail)

Caudate

(tail)

P

ut

am

en

P

ut

am

en Lateral

fissure

Entorhinal cortex

Pontine gray

Middle cerebellar peduncle

Lateral

geniculate

body

Lateral

geniculate

body

Precentral gyrus

Postcentral gyrus

Central sulcus

Superior

temporal

gyrus

Middle

temporal

gyrus

Inferior temporal gyrus

Parahippocampal gyrus

Fusiform gyrus

Interhemispheric

fissure

Insular gyrusInsular gyrus Lateral

ventricle

Lateral

ventricl e

Lateral vLateral ventriclentriclee

Cerebral

aqueduct

Cerebral

aqueduct

Third ventricle

(pineal recess)

Third ventricle

(pineal recess)

P

re

te

ct

u

m

P

re

te

ct

u

m

Red

nucleus

Red

nucleus

FFornixornix

Ce

rebral peduncle

Ce

rebral peduncle

Ce

rebral peduncle

Ce

re

bral peduncle

Hippo-

campus

Hippo-

campus

Ammon's hoAmmon's hornrn

Dentate gyruDentate gyruss

SubiculumSubiculum

Fimbria/Fimbria/ffornixornix

Caudate (tail)Caudate (tail)

Ventral

complex

Ventral

complex

White

matter

Cortical plate

Layer I

33

1010

55

66

77

88

22

11

1111

Cingulate

gyrus

Cingulate

gyrus

CingulumCingulum

Basal

ganglia

Basal

ganglia

99

MidbraiMidbrainn

PPonsons

TTegmentuegmentumm

ThalamusThalamus

44

CoCorpus callosumrpus callosum

Posterior

complex

Po sterior

complex

Posterior

complex

Po sterior

complex

Central

complex

Central

complex

Damaged areas in section

1212

1212

1414

1515

1313

Su

bs

ta

nt

ia^

ni

gr

a

Su

bs

ta

nt

ia^

ni

gr

a

P

a

r

a

ce

n

tr

a

l lo

b

u

le

P

a

r

a

ce

n

tr

a

l lo

b

u

le

1 Pa racentral neuroepithelium and subventricular zone

7 Te mporal neuroepithelium and subventricular zone

Pa rahippocampal neuroepithelium, subventricular zone,

(^6) and stratified transitional field
2 Pa racentral stratified transitional field
8 Te mporal stratified transitional field
Remnants of the germinal matrix, migratory streams, and transitional fields
12 Po sterior striatal neuroepithelium and subventricular zone
13 Strionuclear glioepithelium
14 Mesencephalic glioepithelium/ependyma
15 Subpial granular layer (cortical)
4 Callosal sling
5 Fo rnical glioepithelium
11 Lateral migratory stream (cortical)
9 Alve ar glioepithelium
10 Subgranular zone (dentate)
3 Callosal glioepithelium
PLATE 12