The Human Brain During the Third Trimester

Anteromedial striatal neuroepithelium

and subventricular zone

G

lo

bu

s^

p

al

lid

u

s

(e

x

te

rn

al

s

eg

m

en

t)

G

lo

bu

s^

p

al

lid

u

s

(e

x

te

rn

al

s

eg

m

en

t)

G

lo

bus pallidus

(inter

nal segm

ent)

G

lo

bu

s pallidus

(inter

nal segm

ent)

FFornixornix

Mammillo-

thalamic

tract

Mammillo-

thalamic

tract

Fimbria/fFimbria/fororninixx

Dentate gyrusDentate gyrus

Diagonal band of BrDiagonal band of Broca (voca (vertical limb)ertical limb)

Median prMedian preoptic nucleueoptic nucleuss

Anterior commissuAnterior commissurree

Exter

nal capsule

Exter

nal capsule

Lateral

septal nuc.

Lateral

septal nuc.

Medial

septal nuc.

Medial

septal nuc.

Caudate

(tail)

Caudate

(tail)

Co

rp

us

(^) ca
llo
su
m
(ro
str
um
)
Co
rp
us
(^) ca
llo
su
m
(ro
str
um
)
Para-
hippocampal
gyrus
Para-
hippocampal
gyrus
CingulumCingulum
Rostral migratory stream (source area)Rostral migratory stream (source area)
Callosal
glioepithelium
Interhemispheric fissure
ReuniensReuniensnucleusnucleus
Parafascicular
nucleus
Parafascicular
nucleus
Centromedian
nucleus
Centromedian
nucleus
Ventral
postero-
lateral
nucleus
Ventral
postero-
lateral
nucleus
Ventral
lateral
nucleus
Ventral
lateral
nucleus
Ventral
medial
nucleus
Ventral
medial
nucleus
PulvinarPulvinar
Lateral habenular
nucleus
Medial habenular
nucleus
Habenulo-
interpeduncular
tract
Pineal gland
Third ventricle
(pineal recess)
Stria
terminalis
Stria
terminalis
Bed
(^) nuc
leus
the (^) s (^) of
te tria
rmin
alis
Bed
(^) nuc
leus
the (^) s (^) of
te tria
rmin
alis

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

Cla

ustr

um

Cla

ustr

um

P

u

ta

m

en

P

u

ta

m

en

Ins

ula

r^ g

yr

us

Ins

ula

r^ g

yr

us

Choroid

plexus

Choroid

plexus

P

O

S

T

E

R

I

O

R

C O M P L E X

P

O

S

T

E

R

I

O

R

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

VENTRAL

COMPLEX

VENTRAL

COMPLEX

C

en

tr

al

lat

eralnuc

leu

s

C

en

tr

al

lat

eralnuc

leu

s

PERIVENTRICULAR

CO

M

PL

E

X

PERIVENTRICULAR

CO

M

PL

E

X

Third ventricle Third ventricle

CENTRAL

COMPLEX

CENTRAL

COMPLEX

Ammon's horAmmon's hornn

SubiculuSubiculumm

Zona

incerta

Zona

incerta

Forel's

fields

Forel's

fields

BBASAL GANGLIASAL GANGLIAA

SUBTHALAMUSSUBTHALAMUS

THALAMUSTHALAMUS

Cingulate gyruCingulate gyruss

Visual radiation

Germinal and transitional structures in italics

Frontal

lobe

Frontal

lobe

Lateral

ventricle

Lateral

ventricl

e

Ca

ud

at

(he e

ad

)

Ca

ud

at

(he e

ad

)

Lateral fissure

Stem cells of

choroid plexus

Stem cells of

choroid plexus

DORSAL

HIPPOCAMPUS

Posterior lim

b

Posterior lim

b

An

ter

ior

(^) lim
b
An
ter
ior
(^) lim
b
In
te
rn
a
l cap
su
le
In
te
rn
al ca
p
su
le
Frontal neuroepithelium and
subventricular zone
Fr ontal neuroepithelium and
subventricular zone
Frontal stratified
transitional field
Fr ontal stratified
transitional field
Strionuclear
glioepithelium
Strionuclear
glioepithelium
Septal glioepithelium/ependymaSeptal glioepithelium/ependyma
Fornical
glioepithelium
Fo rnical
glioepithelium
GlioepitheliuGlioepitheliumm
Alve ar glioepithelium
Callosal
glioepithelium
Subgranular zoneSubgranular zone
Lateral fissure
Po sterior striatal neuroepithelium
and subventricular zone
Pa rietal/temporal neuroepithelium
and subventricular zone
Pa rietal/temporal
stratified tran-
sitional field
Lateral
ventricle
Corpus
callosum
Corpus
callosum
White matter
Cortical plate
Layer I
SEPTUM
Medial
forebrain
bundle
Medial
forebrai n
bundle
Anterolateral striatal neuroepithelium
and subventricular zone
Anterolateral striatal neuroepithelium
and subventricular zone
Diencephalic (thalamic)
glioepithelium/ependyma
Diencephalic (thalamic)
glioepithelium/ependyma
PLATE 84B