The Human Brain During the Third Trimester

Paracentral neuroepithelium

and subventricular zone

Pa racentral neuroepithelium

and subventricular zone

Interhemispheric

fissure

White matterWhite matter

Cortical platCortical platee

Layer I

Cingulate

gyrus

Cingulate

gyrus

Induseum

griseum

Induseum

griseum

Lateral

ventricle

Lateral

migratory

stream

Lateral

migratory

stream

Exter

nal capsul

e

Exter

nal capsul

e

Lateral fissure

FFornixornix

I

n

s

u

la

r

g

y

r

u

s

I

n

s

u

la

r

g

y

r

u

s

Third

ventricle

ChorChoroid plexusoid plexus

ChorChoroid plexusoid plexus

Choroid

plexus

Choroid

plexus

Entorhinal

cortex

Entorhinal

cortex

Entorhinal

cortex

Entorhinal

cortex

Dorsomedial

Nucleus

Dorsomedial

Nucleus

CoCorpus callosum (body)rpus callosum (body)

Stria

terminalis

Stria

terminalis

Caudate

nucleus

(tail)

Caudate

nucleus

(tail)

Caudate

nucleus

(tail)

Caudate

nucleus

(tail)

Zona

incerta

Zona

incerta

Cer

ebral peduncle

Cer

ebral peduncle Lateral Lateral ventricleventricle

P

u

ta

m

e

n

P

u

ta

m

e

n

CA1CA1

PPontine grayontine gray

Su

bs

ta

nt

ia

n

ig

ra

Su

bs

ta

nt

ia

n

ig

ra

Ventral

tegmental area

Ve ntral

tegmental area

Interpeduncular

nucleus

Interpeduncular

nucleus

CA3CA3

CA3CA3

Ventral

posteromedial

nucleus

Ve ntral

posteromedial

nucleus

Ventro-

posterolateral

nucleus

Ve ntro -

posterolateral

nucleus

Centro-

median

nucleus

Centro -

median

nucleus

Red

nucleus

Red

nucleus

Medial habenular

nucleus

Pontocerebellar fibers

(decussation)

Pontocerebellar fibers

Middle cerebellar

peduncle

Lateral habenular nucleus

Stria medullaris

Dorsolateral

nucleus

Dorsolateral

nucleus

CingulumCingulum

Habenulo-

interpeduncular

tract

Habenulo-

interpeduncular

tract

Habenulo-

interpeduncular

tract

A

m

m

o

n

's

h

or

n

A

m

m

o

n

's

h

or

n

Presubic

ul

um

Presubic

ul

um

Su

bic

ulum

Su

bic

ulum

M

o

le

cu

lar

layer

M

o

le

cu

lar

layer

G

ra

nu

larlay

er

G

ra

nu

larlay

er

St

rat

umoriens

St

rat

umoriens

P

yr

am

idalla

ye

r

P

yr

am

idalla

ye

r

Str

atum

la

cu

n

os

u

m

m

ol

e

c

u

al

er

Str

atum

la

cu

n

os

u

m

m

ol

e

c

u

al

er

Str

atumr

ad

ia

tu

m

Str

atumr

ad

ia

tu

m

FimbriFimbriaa

HiluHiluss

Inter-

peduncular

fo ssa

Oculomotor

nuclear complex (III)

Oculomotor

nuclear complex (III)

Medial

longitudinal

fasciculus

Medial

longitudinal

fasciculus Optic

tract

Optic

tract

Lateral

geniculate

body

Lateral

geniculate

body

Stria

terminalis

Stria

terminalis

Lateral

migratory

stream

Lateral

migratory

stream

Oculomotor

nerve fibers?

Oculomotor

nerve fibers?

P

ar

a

fa

sc

ic

u

la

r

n

u

cl

e

u

s

P

ar

a

fa

sc

ic

u

la

r

n

u

cl

e

u

s

Pa

ra

ce

n

tr

a

l

n

u

cl

eu

s

Pa

ra

ce

n

tr

a

l

n

u

cl

eu

s

R

e

ti

c

u

la

r

n

u

cl

e

u

s

R

e

ti

c

u

la

r

n

u

cl

e

u

s

Ventral

lateral

nucleus

Ve ntral

lateral

nucleus

Ventral medial

nucleus

Ventral medial

nucleus

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
DDOORRSSAALL CCOOMMPPLLEEXX
THALAMUSTHALAMUS
PONSPONS
MIDBRAIMIDBRAINN
P
E
R
IV
E
N
T
R
IC
U
L
A
R
C
O
M
P
L
E
X
P
E
R
IV
E
N
T
R
IC
U
L
A
R
C
O
M
P
L
E
X
C
E
N
T
R
A
L
C
O
M
P
LE
X
C
E
N
T
R
A
L
C
O
M
P
LE
X
R
E
T
IC
U
L
A
R
B
E
L
T
R
E
T
IC
U
L
A
R
B
E
L
T
SSUUBBTTHHAALLAAMMUUSS
BASAL
GANGLIA
BA SAL
GANGLIA
Subgranular
zone
Subgranular
zone
Subgranular
zone
neD
at
et
g
ry
u
s
neD
at
et
g
ry
u
s
Paracentral
lobule
Paracentral
lobule
Temporal
lobe
Te mporal
lobe
HHIPPOIPPOCCAAMMPUPUSS
Temporal stratified
transitional field
Te mporal stratified
transitional field
Temporal neuro-
epithelium and
subventricular
zone
Te mporal neuro-
epithelium and
subventricular
zone
Parahippocampal
gyrus
Parahippocampal
gyrus
Pa rahippocampal neuroepithelium,
subventricular zone, and
stratified transitional field
AlvAlve ar glioepitheliuear glioepitheliumm
Meyer's loop
(visual
radiation)
Meyer's loop
(visual
radiation)
Callosal glioepitheliuCallosal glioepitheliumm
Posterior striatal
neuroepithelium and
subventricular zone
Po sterior striatal
neuroepithelium and
subventricular zone
Posterior striatal
neuroepithelium and
subventricular zone
Po sterior striatal
neuroepithelium and
subventricular zone
FFo rnical glioepitheliuornical glioepitheliumm
Fornical
glioepithelium
Fo rnical
glioepithelium
Paracentral stratified
transitional field
Pa racentral stratified
transitional field
Strionuclear
glioepithelium
Strionuclear
glioepithelium
Stem cells of
choroid plexus
Stem cells of
choroid plexus
TTe gmentumegmentum
Germinal and transitional structuGerminal and transitional structurres ines in italicsitalics
Subpial granular layer
Internal
capsule
Internal
capsule
Callosal sling
PLATE 37B