The Human Brain During the Third Trimester

Claustru

m

Claustru

m

PutamenPutamen

PutamenPutamen

FFoorrnniixx

FFoorrnnixix

Exte

rnal^ ca

psule

Exte

rnal^ ca

psule

Ex

ter

na

l^ ca

ps

ule

Ex

ter

na

l^ ca

ps

ule

Ex

ter

na

l (^) c
ap
su
le
Ex
ter
na
l (^) c
ap
su
le
Caudate
(tail)
Caudate
(tail)
P
re
te
ct
u
m
P
re
te
ct
u
m
P
r
e
te
ct
u
m
P
r
e
te
ct
u
m
Pineal gland
Superior colliculus
Optic nerve layer
(superior colliculus)
Third ventricle
(pineal recess)
Posterior commissure
Lateral fissure
Lateral fissure
Interhemispheric fissure
Ventral tenia tecta

V

en

tr

al

an

terio

r

n

u

cle

u

s

V

en

tra

l

an

terio

r

n

u

cle

u

s

V

entral

latera

l

nucleus

Ve

ntra

l

latera

l

nucleus

Claust

rum

Claust

rum

Ins

ular

(^) gyr
us
Ins
ular
(^) gyr
us
Insular
gyrus
Insular
gyrus
Stria
terminalis
Stria
terminalis
BBA SAL GANGLIASAL GANGLIAA
THALAMUSTHALAMUS
Ven
tra
l
pos
ter
ola
tera
l
nu
cleu
s
Ven
tra
l
pos
ter
ola
tera
l
nu
cleu
s PulvinarPulvinar
Third
ventricle

POSTERIOR

COMPLEX

POSTERIOR

COMPLEX

PPerieriventricular nucleiventricular nuclei

Mammillo-

thalamic

tract

Mammillo-

thalamic

tract

Lat

era

l m

igra

tory

stre

am

Lat

era

l m

igra

tory

stre

am

Centromedian

nucleus

Centro median

nucleus

Diagonal band of Broca

(vertical limb)

Diagonal band of Broca

(vertical limb)

Forel's

fields

Forel's

fields

Dorsomedial

nucleus

Dorsomedial

nucleus

A

n

te

ri

or

c

o

m

m

is

su

re

A

n

te

ri

or

c

o

m

m

is

su

re

C

en

tr

a

l

la

te

ra

ln

u

cl

eu

s

C

en

tr

a

l

la

te

ra

ln

u

cl

eu

s

Parahippocampal

gyrus

Subcallosal ar

ea

Subcallosal ar

ea

Co

rpu

s (^) c
all
osu
m
(ro
str
um
)
Co
rpu
s (^) c
all
osu
m
(ro
str
um
)
N
uc
le
us
ac
cu
m
be
ns
N
uc
le
us
ac
cu
m
be
ns
N
accumucleus
bens
N
accumucleus
bens
G
lo
b
u
s^
p
allid
u
s
(e
x
te
rn
al
se
gm
en
t)
G
lo
b
u
s^
p
allid
u
s
(e
x
te
rn
al
se
gm
en
t)
Gl
ob
us
(^) pa
llid
us
(ex
ter
na
l (^) se
gm
ent
)
Gl
ob
us
(^) pa
llid
us
(ex
ter
na
l (^) se
gm
ent
)
G
lo
b
u
s
p
a
llid
u
s
(in
te
r
n
a
l se
gm
en
t)
G
lo
b
u
s
p
a
llid
u
s
(in
te
rn
a
l se
gm
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)

CE

N

TR

A

L

C

OM

PL

EX

CE

N

TR

A

L

C

OM

PL

EX

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

E

L

T

R E T I C U L A R B

E

L

T

PE

RIV

ENTR

ICULARCOM

PLEX

PE

RIV

ENTR

ICULARCOM

PLEX

Paraventricular

nucleus

Paraventricular

nucleus

HYPOHYPOTHALAMUSTHALAMUS

PREOPTIC

AREA

PREOPTIC

AREA

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

Ventr

alm

ed

ial

nu

cle

us

Ventr

alm

ed

ial

nu

cle

us

Ventra

lpo

ster

om

ed

ial

nu

cle

us

Ventra

lpo

ster

om

ed

ial

nu

cle

us

I

n

t

e

r

n

a

l

c

a

p

s

u

le

I

n

t

e

r

n

a

l

c

a

p

s

u

le

R

e

ti

c

u

l

a

r

n

u

c

le

u

s

R

e

ti

c

u

l

a

r

n

u

c

le

u

s

A

ns

a

lenticularis?

A

ns

a

lenticularis?

Med

forebr ial

ain (^) b
und
le?
Med
forebr ial
ain (^) b
und
le?
Medial
preoptic area
Medial
preoptic area
La
ter
al^
pr
eop
tic
an
d^ h
yp
o-
th
ala
m
ic^ a
rea
s
La
ter
al^
pr
eop
tic
an
d^ h
yp
o-
th
ala
m
ic^ a
rea
s
Primary
olfactory
cortex
(piriform)
Primary
olfactory
cortex
(piriform)

M

e

d

u

ll

a

r

y

la

m

in

a

M

e

d

u

ll

a

r

y

la

m

in

a

MIDBRAI

N

TECTU

M

MIDBRAI

N

TECTU

M

Lateral migratory stream

(infiltrates the claustrum

and the external capsule)

Lateral migratory stream

(infiltrates the claustrum

and the external capsule)

White matter

Layer I

Cortical plate

Callosal glioepithelium

Rostral migratory stream

(source area)

Te mporal neuroepithelium

and subventricular zone

Te mporal stratified

transitional field

Accumbent neuroepithelium

and subventricular zone

(infiltrated by the

rostral migratory stream)

Subpial granular layerSubpial granular layer

Choroid plexus

Germinal and transitional structuGerminal and transitional structurres ines in italicsitalics

Lateral ventricle

Dentate gyrus

Ammon's horn

Subiculum

Fo rnical glioepithelium

PPo sterior striatal neuroepithelium and subvosterior striatal neuroepithelium and subventricular zoneentricular zone

Alve ar glioepithelium

Subgranular zone

Meyer's loop

(visual radiation)

Meyer's loop

(visual radiation)

HIPPO-

CAMPUS

HIPPO-

CAMPUS

Strionuclear

glioepithelium

Strionuclear

glioepithelium

P

o

steri

o

r lim

b

P

o

steri

o

r lim

b

A

n

te

ri

or

(^) li
m
b
A
n
te
ri
or
(^) li
m
b
Diencephalic (thalamic) glioepithelium/ependyma
Diencephalic (hypothalamic)
glioepithelium/ependyma
PLATE 136B