The Human Brain During the Third Trimester

Lateral ventricle

11

1 Callosal glioepithelium

22

2 Fo rnical glioepithelium

33

3 Alve ar glioepithelium

44

44

4 Subgranular zone (dentate)

55

5 Lateral migratory stream (cortical)

8

8 Strionuclear glioepithelium

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

9 External germinal layer (cerebellum)

9

66

66

6 Amygdaloid glioepithelium/ependyma

77

7 Po sterior striatal neuroepithelium and subventricular zone

10 Subpial granular layer (cortical)

10

Corpus

callosum

(splenium)

Corpus

callosum

(splenium)

Occipital

gyrus

Pa

rie

to

• oc

ci

pit

al

su

lc

us

VVe ntral striatuentral striatumm

Globus pallidus

(internal

segment)

Globus pallidus

(internal

segment)

Globus pallidus

(external segment)

Globus pallidus

(external segment)

Stria

terminalis

Stria

terminalis

PutamenPutamen

Caudate nucleus

(tail)

Caudate nucleus

(tail)

BBA SAL GANGLIASAL GANGLIAA

SUBSTANTIA

INNOMINATA

SUBSTANTIA

INNOMINAT A

Basal nucleus

of Meynert

Basal nucleus

of Meynert

Basal nucleus

of Meynert

Basal nucleus

of Meynert

Anterior

commissure

Anterior

commissure

Endopiriform

nucleus

Endopiriform

nucleus

Lateral

cortical nucleus

Lateral

cortical nucleus

Presubiculu

m

Presubiculu

m

Central

nucleus

Central

nucleus

Basolateral nuclea

r

complex

Basolateral nuclea

r

complex

Striatal cell bridgeStriatal cell bridge

ClaustrumClaustrum

E

x

te

r

n

a

l^

c

a

p

su

le

E

x

te

r

n

a

l^

c

a

p

su

le

M

ed

ia

l (^) n
u
cl
eu
s
M
ed
ia
l (^) n
u
cl
eu
s
Primary
olfactory
cortex
(piriform)
Primary
olfactory
cortex
(piriform)
Orbital
gyrus
Orbital
gyrus
A
M
Y
G
D
A
L
A
A
M
Y
G
D
A
L
A
Entorhinal cortexEntorhinal cortex
Anterior
amygdaloid
area
Anterior
amygdaloid
area
Dentate
gyrus
Dentate
gyrus
Ammon's horAmmon's hornn
Subic
ulum
Subic
ulum
SubiculuSubiculumm
VENTRAL
HIPPOCAMPUS
VENTRAL
HIPPOCAMPUS
Optic tractOptic tract
FusifFusiform gyrusorm gyrus??
FlocculuFlocculuss
C
rus I, ansif
or
m
lo
bul
e
(H
VIIA
)
C
rus I, ansif
or
m
lo
bu
le
(H
VIIA
)
Crus II
ansiform lobule
(HVIIA)
Crus II
ansiform lobu le
(HVIIA)
Superior
parietal
lobule
Superior
parietal
lobu le
Occipital
gyrus
Occipital
gyrus
Occipital
gyrus
Pa
ra
hip
po
ca
mp
al
gy
ru
s
Pa
ra
hip
po
ca
mp
al
gy
ru
Cerebral s
peduncle
Cerebral
peduncle
Internal
capsule
Internal
capsule
THALAMUSTHALAMUS
Ventral
postero-
lateral
nucleus
Ventral
postero-
lateral
nucleus
PulvinarPulvinar

R

et

icu

lar

nucle

us

R

et

icu

lar

nucle

us

Supra-

geniculate

nucleus

Supra-

geniculate

nucleus

Anterior lim

b

Anterior lim

b

Posterior lim

b

Posterior lim

b

L

a

t

e

r

a

l

f

i

s

s

u

r

e

I

n

s

u

l

a

r

g

y

r

u

s

I

n

s

u

l

a

r

g

y

r

u

s

Lateral Lateral ventricleventricle

DORSAL

HIPPOCAMPUS

DORSAL

HIPPOCAMPUS

FFimimbbrriaia

FFornixornix

Choroid

plexus

Choroid

plexus

Co

rp

us

ca

llo

su

m

(b

od

y)

Co

rp

us

callo

su

m

(b

od

y)

A n

t e

r i

o r

l

o b

e

( H

I -

H V

)

A n

t e

r i

o r

l

o b

e

( H

I -

H V

)

Primary fissure

CEREBELLUM HEMISPHERECEREBELLUM HEMISPHERE

Lateral ventricle

Me

dull

aryla

mina

Me

dull

aryla

mina

PLATE 60B