The Human Brain During the Third Trimester

White matter

Cortical plate

Layer I

BASAL

GANGLIA

BA SAL

GANGLIA

TTe mporal lobeemporal lobe

Putamen

Globus pallidus

Callosal

glioepithelium

Strionuclear

glioepithelium

Strionuclear

glioepithelium

Subgranular zone

Extramural migratory stream (from the precerebellar neuroepithelium

to the pontine gray and the reticular tegmental nucleus)

Lateral migratory stream

Interhemispheric

fissure Induseum

griseum

Induseum

griseum

Pontine gray

Reticular tegmental nucleus

Middle cerebellar peduncle

Cave of the

septum

Cave of th e

septum

FFornixornix

CCoorrppuussccaalllloossuumm((bbooddyy))

Third

ventricle

Inter-

peduncular

nucleus

Inter-

peduncular

nucleus

Oculomotor complex (III)Oculomotor complex (III)

Habenulo- interHabenulo- interpeduncular tractpeduncular tract

Inter-

peduncular

fo ssa

Ventral

tegmental

area

Ve ntral

tegmental

area

Lateral ve ntricle

Choroid

plexus

Choroid

plexus

THALAMUSTHALAMUS

R

e

t

ic

u

la

r

n

u

c

le

u

s

R

e

t

ic

u

la

r

n

u

c

le

u

s

R

E

T

IC

U

L

A

R

B

E

L

T

R

E

T

IC

U

L

A

R

B

E

L

T

C

er

eb

r

al

(^) p
ed
u
n
cl
e
C
er
eb
r
al
(^) p
ed
u
n
cl
e
C
er
eb
r
al
(^) p
ed
u
n
cl
e
C
er
eb
r
al
(^) p
ed
u
n
cl
e
Caudate (tail)
Lateral ve ntricle
Cingulum Cingulate
gyrus
Cingulate
gyrus
Caudate tailCaudate tail
Su
bic
ulu
m
Su
bic
ulu
m

P

a

ra

ce

n

tr

a

l

n

u

cl

eu

s

P

a

ra

ce

n

tr

a

l

n

u

cl

eu

s

Dorsomedial

nucleus

Dorsomedial

nucleus

St

ri

a

m

ed

ul

la

ri

s

St

ri

a

m

ed

ul

la

ri

s

Ventral

lateral

nucleus

Ve ntral

lateral

nucleus

Su

bth

ala

mi

c

nu

cleu

s

Su

bth

ala

mi

c

nu

cleu

s

Ventral

posteromedial

nucleus

Ve ntral

posteromedial

nucleus

Ventral

posterolateral

nucleus

Ve ntral

posterolateral

nucleus

Ventral

anterior

nucleus?

Ve ntral

anterior

nucleus?

Dorsolateral

nucleus

(dorsal complex)

Dorsolateral

nucleus

(dorsal complex)

Centro-

median

nucleus

Centro -

median

nucleus

DORSAL

COMPLEX

DORSAL

COMPLEX

Zo

na in

cer

ta

Zo

na in

cer

ta

External capsule

Claustrum

Internal capsule (posterior limb)

Stria terminalis

Stria terminalis

Optic tract

PONSPONS

Red

nucleus

Red

nucleus

Substantia

nigra

Substantia

nigra

MIDBRAIN

TEGMENTUM

MIDBRAIN

TEGMENTUM

HIPPOCAMPUHIPPOCAMPUSS

Pars

compacta

Pars

compacta

P

ars

reticulata

Pars reticulata

ANTERIOR

COMPLEX

(anteroventral

nucleus)

ANTERIOR

COMPLEX

(anteroventral

nucleus)

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

Ento

rh

in

a

l

c

o

r

t

e

x

Ento

rh

in

a

l

c

o

r

t

e

x

A

m

m

o

n

's

ho

rn

A

m

m

o

n

's

ho

rn

Dentate

gyrus

Dentate

gyrus

Lateral

geniculate

body

Lateral

geniculate

body

FimbriaFimbria

Pa racentral

neuroepithelium and

subventricular zone

Pa racentral

stratified transitional field

Po sterior striatal neuroepi-

thelium and subventricular

zone

Po sterior striatal neuroepi-

thelium and subventricular

zone

Subpial

granular

layer

Alve ar glioepithelium

Choroid plexus

stem cells?

Choroid plexus

stem cells?

Fornical

glioepithelium

Fo rnical

glioepithelium

Fo

ra

m

en

of

M

on

ro

Pa rahippocampal

stratified transitional field

Pa rahippocampal

neuroepithelium and

subventricular zone

Germinal and transitional structuGerminal and transitional structurres ines in italicitalicss

Thalamic

glioepithelium/

ependyma

Thalamic

glioepithelium/

ependyma

P

resubiculu

m

P

resubiculu

m

Para-

hippocampal

gyrus

Para -

hippocampal

gyrus

FusifFusiform gyrusorm gyrus

Me yer's loop (visual radiation)

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

PLATE 181B