The Human Brain During the Third Trimester

Dorsal

hippocampus

GW26 Sagittal

CR 225 mm

Y147-63

Level 5: Section 381

Nerve V (root)

Lateral ve ntricle

Olfactory tubercle

Primary Primary ffissuissurree

Spinocerebellar tracts?

Parieto-

occipital

sulcus

Marginal

sulcus

Marginal

sulcus

Induseum

griseum?

Induseum

griseum?

Middle cerebellar peduncle

Inferior cerebellar peduncle

ThalamusThalamus

Paraflocculus

Orbital gyrusOrbital gyrus

Parietal

lobe

Parietal

lobe

Frontal

lobe

Frontal

lobe

PParacentral loaracentral lobbuullee

Frontal

lobe

Frontal

lobe

Sp

le

ni

um

Sp

le

ni

um

BBaassaall ggaanngglliiaa

Nucleu

accum s

bens

Nucleu

accum s

bens

Ventral

hippocampus

Ventral

hippocampus

Dorsal

hippocampus

PPonsons

Occipital

lobe

Occipital

lobe

Cortical plate

White matter

Layer I

L

at

er

al

v

en

tr

ic

le

Cere bellum

(hemisphere )

AnteriorAnteriorlobelobe

Dentate

nucleus

Dentate

nucleus

Simplex

lobule

Simplex

lobule

Ansiform

lobule

(crus II)

Ansiform

lobu le

(crus II)

Biventral lobule

Paramedian lobule

Ansiform

lobule

(crus I)

Ansifo rm

lobu le

(crus I)

11

22

33

44

44

55

66

66

88

99

1010

1111

1212

13

14

14

14

77

8 Alvear glioepithelium

9 Amygdaloid glioepithelium/ependyma

10 Anterolateral striatal neuroepithelium and subventricular zone

11 Anteromedial striatal neuroepithelium and subventricular zone

12 Strionuclear glioepithelium

6 Occipital stratified transitional field

7

Pa rahippocampal neuroepithelium, subventricular

zone, and stratified transitional field

Co

rp

us

ca

llos

um

Co

rp

us

ca

llos

um

Cingulate gyru

s

Cingulate gyru

s

Ci

ng

ula

te^

gy

rus

(re

tro

spl

en

ial^

ar

ea)

Ci

ng

ula

te^

gy

rus

(re

tro

spl

en

ial^

ar

ea)

SubthalamusSubthalamus

En

tor

hin

al

cor

Entotex

rhin

al

cor

tex

Cing

ulum

Cing

ulum

CENTRAL

COMPLEX

CENTRAL

COMPLEX

Cingulate

sulcus

Central sulcus

Calcarine sulcuCalcarine sulcuss

Forn

ix

Forn

ix

Globus

pallidus

Globus

pallidus

CaudatCaudatee

Internal

ca

ps

ul

e

Internal

ca

ps

ul

e

Substantia

innominata

Substantia

innominata

A

m

yg

da

la

A

m

yg

da

la

PO

ST

E

R

IO

R

C

O

M

LP

XE

PO

ST

E

R

IO

R

C

O

M

LP

XE

V

E

N

T

R

A

LC

OM

PLEX

V

E

N

T

R

A

LC

OM

PLEX

Corona

radiata

Corona

radiata Ce

re

bralpedun

cle

C

er

ebr

alpedu

ncl

e

Pa

ra

hip

po

ca

m

pa

l g

yr

us

Pa

ra

hip

po

ca

m

pa

l g

yr

us

DOR

SAL

COM

PLE

DORSALX

COM

PLE

X

2 Fr ontal neuroepithelium and subventricular zone

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

13 External germinal layer (cerebellum)

1 Rostral migratory stream (source area)

5 Fo rnical glioepithelium

4 Callosal glioepithelium

14 Subpial granular layer (cortical)

3 Fr ontal stratified transitional field

Damaged areas in section

See detail of brain core and

cerebellum in Plates 204A and B.

Primary visual

cortex

Primary visual

cortex

PLATE 194