The Human Brain During the Third Trimester

Cingulate gyrusCingulate gyrus

CingulumCingulum

Ca ud ate

(^) (h
ead
)
Ca
ud
ate
(^) (h
ead
)
Pu
tam
en
Pu
tam
en
Caudate (tail)
Induseum griseum
Band of Gennari
(striate cortex)
Fasciola cinereum?
ChorChoroid plexusoid plexus
Cla
ustr
um
Cla
ustr
um
White matterWhite matter
Lateral
ventricle
Lateral
ventricle
Frontal
lobe
Frontal
lobe
Parietal
lobe
Parieta l
lobe
Occipital lobeOccipital lobe
PParacentral lobulearacentral lobule
Insu
lar gy
rus
Insu
lar^ gy
rus
Exte
rnal capsul
e
Exter
nal capsul
e
Lateral fissure
Co
rt
ic
al
p
l
a
t
e
Co
rt
ic
al
p
l
a
t
e
Stria
terminalis
Stria
terminalis
Stria terminalisStria terminalis
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
An
te
rio
r
lim
b
An
te
rio
r
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

VE

NT

RA

L^

CO

M

PL

EX

VE

NT

RA

L^

CO

M

PL

EX

DORSAL COMPLEXDORSAL COMPLEX

P

O

S

T

E

R

IO

R

C

O

M

P

L

E

X

P

O

S

T

E

R

IO

R

C

O

M

P

L

E

X

PERIVENTR

ICU

LA

R

C

O

M

P

L

E

X

PERIVENTR

ICU

LA

R

C

O

M

P

L

E

X

CENTRALCOM PLE X

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

THALAMUSTHALAMUS

HIPPOCAMPUHIPPOCAMPUSS

SEPTUMSEPTUM

Fo rn ix

Fo rn ix FFornixornix

Lateral septal nucleus

Lateral septal nucleus Choroid plexus (in roof of third ventricle)

Choroid plexus (in roof of third ventricle)

Subfornical organ?

Dorsomedial nucleus

PulvinarPulvinar

Antero- ventral nucleus

Antero- ventra l nucleus

Anterodorsal nucleus

Ventral anterior nucleus

Ve ntral anterior nucleus

Ventral lateral nucleus

Ve ntral lateral nucleus

Ventral posteromedial nucleus

Ve ntral posteromedial nucleus

Ventral posterolateral nucleus

Ve ntral posterolateral nucleus

Re tic ula rn ucl eus

Striamedu llaris Striamedu llaris

C

o

r

p

u

s

c

a

ll

o

s u

m

C

o

r

p

u

s

c

a

ll

o

s u

m

C

o pr u s ca ll o s u m (s p le n iu m )

C

o pr u s ca ll o s u m (s p le n iu m ) Cave of the septum

Central sulcus

Precentral gyrus Postcentral gyrus

Subpial granular layerSubpial granular layer

SubiculuSubiculumm

Dentate gyrusDentate gyrus

Ammon's horAmmon's hornn

Cingulate gyrus

(r etr osplenial ar

ea )

Cingulate gyrus

(r etr osplenial ar

ea )

Fimbria/fFimbria/fororninixx

Induseum griseum

C

en tr al la ter aln ucleus

C

en tr al la ter aln ucleus

Damaged area

Visual radiation Cortical motor output (in internal capsule)

Frontal neuroepithelium and subventricular zone

Fr ontal neuroepithelium and subventricular zone

Parahippocampal neuroepithelium, subventricular zone, and stratified transitional field

Pa rahippocampal neuroepithelium, subventricular zone, and stratified transitional field

Frontal stratified transitional field

Fr ontal stratified transitional field

FFo rnical glioepitheliuornical glioepitheliumm

Striatal neuroepithelium and subventricular zone

Posterior striatal neuroepithelium and subventricular zone

Po sterior striatal neuroepithelium and subventricular zone

Callosal glioepitheliuCallosal glioepitheliumm

Occipital neuroepithelium and subventricular zone

Glioepithelium

GlioepitheliuGlioepitheliumm

Occipital stratified transitional field

Pa rietal neuroepithelium and subventricular zone

Pa rietal stratified transitional field

Fo rn ix Fo rn ix

FimbriFimbriaa

Germinal and transitional

structures in italics

Po

st er

io

r li m

b

AnterolateraAnterolaterall

AnteromedialAnteromedial

AlAlvve ar glioepitheliuear glioepitheliumm

Strionuclear glioepithelium

Callosal slinCallosal slingg

PLATE 230B

The Human Brain During the Third Trimester

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

VE

NT

RA

L^

CO

M

PL

EX

VE

NT

RA

L^

CO

M

PL

EX

DORSAL COMPLEXDORSAL COMPLEX

ANTERIOR

COMPLEX

ANTERIOR

COMPLEX

P

O

S

T

E

R

IO

R

C

O

M

P

L

E

X

P

O

S

T

E

R

IO

R

C

O

M

P

L

E

X

PERIVENTR

ICU

LA