The Human Brain During the Third Trimester

Hilus

Orbital gyrusOrbital gyrus

Lateral

ventricle

BASAL

GANGLIA

BA SAL

GANGLIA

PulvinarPulvinar

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

PutamenPutamen

PutamenPutamen

Ventral

striatum

Ve ntral

striatum

C

(tail)audate

C

(tail)audate

A

n

te

ri

or

co

m

m

is

su

re

A

n

te

ri

or

co

m

m

is

su

re

ChorChoroid plexusoid plexus

Ch

or

oid

p

le

xu

s

Ch

or

oid

p

le

xu

s

Stratum orienStratum orienss

Pyramidal laPyramidal layeyerr

Stratum radiatumStratum radiatum

Stratum lacunosum-

moleculare

Stratum lacunosum-

moleculare

Granular laGranular layeyerr

Hilus

Subgranular zoneSubgranular zone

Molecular laMolecular layeyerr

THALAMUSTHALAMUS

Lateral

geniculate

body

Lateral

geniculate

body

Int

er

na

lc

ap

su

le

(a

nt

er

ior

lim

b)

Int

er

na

lc

ap

su

le

(a

nt

er

ior

lim

b)

Cor

tic

al

p

la

te

Cor

tic

al

p

la

te

White matterWhite matter

Globus pallidus

(external

segment)

Glob us pallidus

(external

segment)

SUBSTANTIA

INNOMINATA

SUBSTANTIA

INNOMINAT A

Bas

al^ nu

cleu

s

of^ M

eyne

Basal^ n rt

ucleu

s

of^ M

eyne

rt Dentate

gyrus

Dentate

gyrus

Ammon's

horn

Ammon's

horn

Ans

a^ le

ntic

ular

is^

Ans

a^ le

ntic

ular

is^

Stri

a^ te

rmi

nali

s^

Stri

a^ te

rmi

nali

s^

FimbriaFimbria

FimbriaFimbria

A

uditory and visualradiations?

A

uditory and visualradiations?

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

Lateral

ventricle

Lateral

ventricle

AM

YGD

ALA

AM

YGD

ALA

Frontal

lobe

Frontal

lobe

Central

nucleus

Central

nucleus

Lateral

nucleus

Lateral

nucleus

S

tr

ia

te

rm

in

a

li

s

S

tr

ia

te

rm

in

a

li

s

Lateral

migratory

stream

Lateral

migratory

stream

Lateral

migratory

stream

Lateral

migratory

stream

Corona

radiata

Corona

radiata

Corona

radiata

Corona

radiata

Corona

radiata

Corona

radiata

Pr

imar

yolfac

to

ry

c

o

rt

ex

Pr

imar

yolfac

to

ry

c

o

rt

Later ex

al

olf

acto

ry

rt

ca

t

Late

ra

lo

lfacto

ry

rt

ca

t

R

E

T

IC

U

L

A

R

B

EL

T

(R

eticularnucleus)

R

E

T

IC

U

L

A

R

B

EL

T

(R

eticularnucleus)

Cl

au

str

um

Cl

au

str

um

Exte

rnal capsule

External capsule

Un

cin

ate

(^) fa
sc
ic
ulu
s
Un
cin
ate
(^) fa
sc
icu
lu
s
EndopirifEndopiriform nucleuorm nucleuss
Parietal
lobe
Parietal
lobe
CA3CA3
CA3CA3
CA1CA1
CA1CA1
HIPPOCAMPUHIPPOCAMPUSS
Inte
rna
lca
ps
ul
e(
po
st
er
io
r
li
m
b
)
Inte
rna
lca
ps
ul
e(
po
st
er
io
r
li
m
b
)
Alvear
glioepithelium
Alve ar
glioepithelium
Amygdaloid glioepithelium/ependyma Te mporal neuroepithelium
and subventricular zone
Te mporal stratified
transitional field
Parietal neuroepithelium
and subventricular zone
Pa rietal neuroepithelium
and subventricular zone
Subpial granular layer
Fr ontal stratified transitional field Pa racentral stratified transitional field
Pa rietal stratified transitional field
LayLayer er II Stem cells of the Stem cells of the choroid plexuschoroid plexus??
St
em
ce
lls
of
th
e^
ch
or
oi
d^ p
le
xu
s?
St
em
ce
lls
of
th
e^
ch
or
oi
d^ p
le
xu
s?
Germinal and transitional structures in italics
Posterior striatal
neuroepithelium and
subventricular zone
Posterior striatal
neuroepithelium and
subventricular zone
Strionuclear glioepitheliuStrionuclear glioepitheliumm
PLATE 208B