The Human Brain During the Third Trimester

Claustru

m

Claustru

m

PutamenPutamen

Putam

en

Putam

en

FFoorrnniixx

FFoorrnnixix

Ex

ter

na

l c

ap

su

le

Ex

ter

na

l c

ap

su

le

Exter

nal capsule

Exter

nal capsule

Caudate

(head)

Caudate

(head)

C

au

da

(hea te

d)

C

au

da

(hea te

d)

Caudate

(tail)

Caudate

(tail)

P

re

te

ct

um

P

re

te

ct

um

Pr

etectum

Pr

etectum

Pineal gland

Posterior commissure

Habenulo-

interpeduncular tract?

Lateral fissure

Lateral fissure

Lateral fissure

Interhemispheric fissure

Dorsal tenia tecta

V

entra

l

anterio

r

nucleu

s

Ve

ntra

l

anterio

r

nucleu

s

V

e

n

tr

a

l

la

te

ra

l

n

u

c

le

u

s

V

e

n

tr

a

l

la

te

ra

l

n

u

c

le

u

s

Claust

rum

Claust

rum

Insu

lar g

yrus

Insu

lar g

yrus

Insu

lar^

gyr

us

Insu

lar^

gyr

us

Choroid plexus

Stria

terminalis

Stria

terminalis

BBA SAL GANGLIASAL GANGLIAA

THALAMUSTHALAMUS

Ventral

posterolateral

nucleus

Ve ntral

posterolateral

nucleus

PulvinarPulvinar

Third

ventricle

POSTERIOR

COMPLEX

POSTERIOR

COMPLEX

PPerieriventricular nucleventricular nucleii

Mammillothalamic

tract

Mammillothalamic

tract

Lateral migratory stream

(infiltrates the claustrum

and the external capsule)

Lateral migratory streamLateral migratory stream

Ve

nt

ra

l

p

os

te

ro

m

ed

ia

l

n

uc

le

us

Ve

nt

ra

l

p

os

te

ro

m

ed

ia

l

n

uc

le

us

Centromedian

nucleus

Centro median

nucleus

Lateral

septal nucleus

Lateral

septal nucleus

Medial

septal nucleus

Medial

septal nucleus

A

n

teri

r coo

m

m

issu

er

A

n

teri

r coo

m

m

issu

re

C

en

tr

al

la

te

r

al

n

uc

leu

s

C

en

tr

al

la

te

r

al

n

uc

leu

s

Parahippocampal

gyrus

Para-

fascicular

nucleus

Para-

fascicular

nucleus

Subcallosal ar

ea

Subcallosal ar

ea

Co

rp

us ca

llo

su

m

(ro

stru

m

)

Co

rp

us ca

llo

su

m

(ro

stru

m

)

Nucleus

accumbens

Nucleus

accumbens

Nucleus

accumbens

Nucleus

accumbens

Be

dn

ucle

usof

th

e

st

ri

a

te

rm

in

al

is

Be

dn

ucle

usof

th

e

st

ri

a

te

rm

in

al

is

P

ar

ac

en

tra

lnucleus

P

ar

ac

en

tra

lnucleus

R

e

t

i

c

u

l

a

r

n

u

c

l

e

u

s

R

e

t

i

c

u

l

a

r

n

u

c

l

e

u

s

I

n

t

e

r

n

a

l

c

a

p

s

u

l

e

I

n

t

e

r

n

a

l

c

a

p

s

u

l

e

G

lo

bu

s p

allid

us

(e

xte

rn

al se

gm

en

t)

G

lo

bu

s p

allid

us

(e

xte

rn

al se

gm

en

t)

G

lo

b

u

s

pa

ll

id

u

s

(e

xt

er

n

al

(^) s
eg
m
en
t)
G
lo
b
u
s
pa
ll
id
u
s
(e
xt
er
n
al
(^) s
eg
m
en
t)
G
lo
b
us
p
a
lli
d
us
(i
n
te
rn
al
s
eg
m
en
t)
G
lo
b
us
p
a
lli
d
us
(i
n
te
rn
al
s
eg
m
en
t)
G
lo
b
u
s
p
a
llid
u
s
(in
te
rn
a
l s
eg
m
en
t)
G
lo
b
u
s
p
a
llid
u
s
(in
te
rn
a
l s
eg
m
en
t)

M

e

d

u

ll

a

ry

la

mi

na

M

e

d

u

ll

a

ry

la

mi

na

C E N T R A L

(^) C
O M P L E X
C E N T R A L
(^) C
O M P L E X
V E N T R A L C O M
P
L
E
X
V E N T R A L C O M
P
L
E
X

R

E

T

I

C U L A R B

EL

T

R

E

T

I

C U L A R B

EL

T

P

ER

IV

EN

TRIC

ULARCOMPLEX

P

ER

IV

EN

TRIC

ULARCOMPLEX

Paraventricular

nucleus

Paraventricular

nucleus

HYP

OTHALAMUS

HYPO

THALAMUS

S

E

PT

U

M

S

E

PT

U

M

Median preoptic nucleus

Anteromedial

nucleus

Anteromedial

nucleus

ANTERIOR

COMPLEX

ANTERIOR

COMPLEX

M

e

d

u

ll

a

ry

la

m

in

a

M

e

d

u

ll

a

ry

la

m

in

a

White matter

Lateral ventricle

Layer I

Cortical plate

P

os

te

ri

o

r^

li

m

b

P

os

te

ri

o

r^

li

m

b

Anterior lim

b

Anterior lim

b

Strionuclear

glioepithelium

Strionuclear

glioepithelium

Germinal and transitional structuGerminal and transitional structurres ines in italicsitalics

Lateral ventricle

Dentate gyrus

Ammon's horn

Subiculum

Fo rnical glioepithelium

Po sterior striatal

neuroepithelium and

subventricular zone

Alve ar glioepithelium

Subgranular zone

Meyer's loop

(visual radiation)

Meyer's loop

(visual radiation)

HIPPO-

CAMPUS

HIPPO-

CAMPUS

Lateral migratory stream

Subpial granular layer

Callosal glioepithelium

Rostral migratory stream

(source area)

Anterolateral striatal

neuroepithelium and

subventricular zone

(infiltrated by the

rostral migratory stream)

Accumbent neuroepithelium

and subventricular zone

(infiltrated by the

rostral migratory stream)

Diencephalic (thalamic) glioepithelium/ependyma

Diencephalic (hypothalamic)

glioepithelium/ependyma

PLATE 135B