The Human Brain During the Third Trimester

Lateral tuberal nucleus

Forn

ix

Forn

ix

EExxtteerrnnaall ccaappssuullee

Ca

uda

te (^) (
tai
l)
Ca
uda
te (^) (
tai
l)
Cerebral
aqueduct
Cerebral
aqueduct
Nucleus of the lateral lemniscus (dorsal)
Lateral lemniscus
Brachium of the inferior colliculus
Cortical plate
White matter
Layer I
Layer II
Layer III
Layer IV
Layers V-VI
Lateral fissure
Interhemispheric fissure
Orbital gyruOrbital gyruss
Choroid
plexus
Choroid
plexus

S

tr

ia

te

rm

in

a

lis

S

tr

ia

te

rm

in

a

lis

Lateral migratory stream

(infiltrates the endopiriform nucleus)

Rostral migratory stream

Ventro-

medial

nucleus

Ve ntro-

medial

nucleus

Medial

mammillary

nucleus

Medial

mammillary

nucleus

Lateral

mammillary

nucleus

Lateral

mammillary

nucleus

Nucleus

of the lateral

olfactory tract

Nucleus

of the lateral

olfactory tract

A

nt

er

io

r

co

m

m

is

su

re

A

nt

er

io

r

co

m

m

is

su

re

DORSAL

HIPPOCAMPUS

DORSAL

HIPPOCAMPUS

V

E

N

T

R

A

L

H

IP

P

O

C

A

M

P

U

S

V

E

N

T

R

A

L

H

IP

P

O

C

A

M

P

U

S

PParahippocampal gyrusarahippocampal gyrus

Subgranular zoneSubgranular zone

HYPO-

THALAMUS

HYPO-

THALAMUS

PREOPTIC

AREA

PREOPTIC

AREA

Supraoptic nucleuSupraoptic nucleuss

ArArcuate nucleucuate nucleuss

Lamina terminalisLamina terminalis

Glioepithelium

(optic tract)

Medial prMedial preoptic nucleueoptic nucleuss

C

er

eb

ra

l

p

ed

un

cl

e

C

er

eb

ra

l

p

ed

un

cl

e

Central

gray

Central

gray

Endopirirorm

nucleus

Endopirirorm

nucleus

Endopirirorm

nucleus

Endopirirorm

nucleus

Red

nucleus

Red

nucleus

Medial longitudinal

fasciculus

Medial longitudinal

fasciculus

Lateral migratory stream

Primary

olfactory

cortex

(piriform)

Primary

olfactory

cortex

(piriform)

Primary

olfactory

cortex

(piriform)

Primary

olfactory

cortex

(piriform)

Pr

im

ar

y^

olf

ac

to

ry

co

rt

ex

(p

ir

ifo

rm

)

Pr

im

ar

y^

olf

ac

to

ry

co

rt

ex

(p

ir

ifo

rm

)

P

ri

m

ar

y^

ol

fa

ct

or

y

co

rt

ex

(p

ir

ifo

rm

)

P

ri

m

ar

y^

ol

fa

ct

or

y

co

rt

ex

(p

ir

ifo

rm

)

Stria

terminalis

Stria

terminalis

In

te

rn

al

ca

psu

le

(p

oste

rio

r lim

b)

In

te

rn

al

ca

psu

le

(p

oste

rio

r lim

b)

Substantia

nigra

Substantia

nigra

Inferior

colliculus

Inferior

colliculus

Reticular

formation

Reticular

fo rmation

Reticular

formation

Reticular

fo rmation

Olfactory sulcus

Olfactory peduncle

Lateral olfactory tract

AMYGDAMYGDALAALA

AMYGDAMYGDALAALA

Gyrus Gyrus rrectuectuss

F

im

b

r

ia

/f

o

rn

ix

F

im

b

r

ia

/f

o

rn

ix

C

e

re

b

r

a

l

p

ed

u

nc

le

C

e

re

b

r

a

l

p

ed

u

nc

le

Raphe nuclear complexRaphe nuclear complex

L

at

er

al

olf

act

or

yt

ra

c

t

La

teralolfactorytract

L

at

er

al

olf

act

or

yt

ra

c

t

La

teralolfactorytract

Corticomedial

complex

Corticomedial

complex

Central

nucleus

Central

nucleus

A

m

yg

da

lo-

hi

pp

o-

ca

m

pa

l (^) a
re
a
A
m
yg
da
lo-
hi
pp
o-
ca
m
pa
l (^) a
re
a
Inter-
peduncular
fossa
Inter-
peduncular
nucleus
Inter-
peduncular
nucleus
Optic
tract
Optic
tract
Habenulo-inter-
peduncular tract
Habenulo-inter-
peduncular tract
Oculomotor
nerve? (III)
Oculomotor
nerve? (III)
Medial lemniscus, spinocephalic,
and trigemino-thalamic tracts
Central
nucleus
Central
nucleus
Ventral
tegmental
area
Ve ntral
tegmental
area
Medial
forebrain
bundle
Medial
forebrai n
bundle
Anterior commissuAnterior commissurre (temporal limb)e (temporal limb)
InterInternal capsule (posterior limb)nal capsule (posterior limb)
Corticomedial
complex
Corticomedial
complex
Basolateral
complex
Basolateral
complex
Basolateral
complex
Basolateral
complex
Central
nucleus
Central
nucleus
Superior
cerebellar
peduncle
Superior
cerebellar
peduncle
Parabrachial
nucleus
Parabrachial
nucleus
Amygdalo-hippo-
campal area
Amygdalo-hippo-
campal area
Ammon's
hor
n
Ammon's
hor
n
Den
tat
egy
rus
Den
tat
egy
rus
MIDBRAIMIDBRAINN
TECTU
M
TECTU
TEGMENTUMTEGMENTUM M
Oculomotor nuclear complex (III)Oculomotor nuclear complex (III)
Parahippocampal neuroepithelium
and subventricular zone
Pa rahippocampal neuroepithelium
and subventricular zone
Parahippocampal
stratified transitional field
Pa rahippocampal
stratified transitional field
Temporal neuroepithelium
and subventricular zone
Te mporal neuroepithelium
and subventricular zone
FFo rnical glioepitheliuornical glioepitheliumm
Te mporal stratified
transitional field
Alve ar glioepithelium
Lateral ventricle
Stem cells of
choroid plexus
Stem cells of
choroid plexus
PPo sterior striatal neuroepithelium and subvosterior striatal neuroepithelium and subventricular zoneentricular zone
Strionuclear
glioepithelium
Strionuclear
glioepithelium
Germinal and transitional structuGerminal and transitional structurres ines in italicsitalics
Third Third ventricle (preoptic rventricle (preoptic recess)ecess)
PPerieriventricular nucleuventricular nucleuss
Third vThird ventricle (infundibuentricle (infundibularlar recess) recess)
Mesencephalic glioepithelium/ependyma
Diencephalic (hypothalamic)
glioepithelium/ependyma
Diencephalic (hypothalamic)
glioepithelium/ependyma
Amygdaloid
glioepithelium/
ependyma
Amygdaloid
glioepithelium/
ependyma
PLATE 140B