The Human Brain During the Third Trimester

DORSAL

COMPLEX

Choroid plexus

HIPPOCAMPUS

Fimbria/fornix

Subiculum

Dentate gyrus

Ammon's horn

Cingulate gyrusCingulate gyrus

CingulumCingulum

C

au

da

te

(^) (h
ea
d)
C
au
da
te
(^) (h
ea
d)
Pu
tam
en
Pu
tam
en
Caudate (tail)Caudate (tail)
Choroid plexus
(surrounding pineal recess of third ve ntricle)
Medial habenular nucleus
Lateral habenular nucleus
Stria medullaris and habenulo-interpeduncular tract
Clau
stru
m
Clau
stru
m
Lateral ventricle
L
a
te
ra
l
ve
n
tr
ic
le
Temporal
lobe
Te mporal
lobe
PParacentral lobulearacentral lobule
Insula
r gyr
us
Insula
r^ gyr
us
Exte
rnal capsul
e
Exter
nal^ c
apsu
le
Lateral fissure
Stria
terminalis
Stria
terminalis
Stria terminalisStria terminalis
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
A
nt
er
ior
lim
b
A
nt
er
ior
lim
b

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

VENTRAL COMPLEXVENTRAL COMPLEX

DORSAL

ANTERIOR COMPLEX

COMPLEX

ANTERIOR

COMPLEX

P

O

S

T

E

R

OI

R

C

O

M

P

L

E

X

P

O

S

T

E

R

OI

R

C

O

M

P

L

E

X

C

E

N

T

RA

LC

OMPLEX

C

E

N

T

RA

LC

OMPLEX

B

A

S

A

L

G

A

N

G

L

I

A

B

A

S

A

L

G

A

N

G

L

I

A

Layer I

Cortical plate

White matter

THALAMUSTHALAMUS

SEPTUMSEPTUM

Lateral

septal nucleus

Lateral

septal nucleus

Dorsomedial

nucleus

Dorsomedial

nucleus

PulvinarPulvinar

Antero-

medial

nucleus

Antero-

medial

nucleus

Ve

nt

ra

l (^) a
nt
er
io
r
nu
cl
eu
s
Ve
nt
ra
l (^) a
nt
er
io
r
nu
cl
eu
s
V
en
tr
al
(^) la
te
ra
l
nu
cle
us

V

en

tr

al

(^) la
te
ra
l
nu
cle
us Ventral
posteromedial
nucleus
Ve ntral
posteromedial
nucleus
Ve
nt
ra
l
po
ste
ro
la
ter
al
nu
cle
us
Ve
nt
ra
l
po
ste
ro
la
ter
al
nu
cle
us

R

et

ic

u

la

r

nu

cl

eu

s

R

et

ic

u

la

r

nu

cl

eu

s

Cave of th e

septum

Central sulcus

Postcentral gyrus

Precentral gyrus

Subpial granular layer

Induseum griseum? PPEERRIIVVEENNTTRRIICCUULLAARR CCOOMMPPLLEEXX

Stria medullarisStria medullaris

Mammillo-

thalamic tract?

Mammillo-

thalamic tract?

Centromedian

nucleus

Centromedian

nucleus

C

en

tr

al

la

te

ral

nu

cle

us

C

en

tr

al

la

te

ral

nu

cle

us

P

os

te

ri

or

li

m

b

P

os

te

ri

or

li

m

b

G

lo

bus pallidus

(exter

nal segm

ent

)

G

lob

us pallidus

(exter

nal segm

ent

)

Third ventricle

Foramen

of Monro

Forame n

Co of Monro

r

pus callosu

m

Corpus callosu

m

Septal

glioepithelium/

ependyma

Thalamic and epithalamic glioepithelium/ependyma

Subgranular zoneSubgranular zone

Choroid

plexus

Choroid

plexus

Me yer's loop (visual radiation)

Corticofugal fiber s

(in internal capsule)

Fr ontal neuroepithelium

and subventricular zone

Fr ontal stratified

transitional field

Fo rnical glioepithelium

Callosal glioepithelium

Te mporal neuroepithelium

and subventricular zone

Te mporal stratified

transitional field

FFornixornix

FFornixornix

Germinal and transitional

structures in italics

Posterior striatal neuroepithelium

and subventricular zone

Po sterior striatal neuroepithelium

and subventricular zone

G

lio

ep

ith

el

iu

m

AlvAlve ar glioepitheliuear glioepitheliumm

Striatal neuroepithelium

and subventricular zone

Striatal neuroepithelium

and subventricular zone

AnterolateraAnterolaterall

AnteromedialAnteromedial

GlioepitheliuGlioepitheliumm

Strionuclear

glioepithelium

Strionuclear

glioepithelium

PLATE 231B