The Human Brain During the Third Trimester

Fusiform

gyrus

Fusiform

gyrus

Occipital

gyrus

Occipital

gyrus

Nucleus of the

lateral lemniscus (dorsal)

Lateral lemniscus

Occipital

stratified transitional field

Occipital

stratified transitional field

Po

nti

ne

gr

ay

Po

nti

ne

gr

ay

VENTRAL

HIPPOCAMPUS

VENTRAL

HIPPOCAMPUS

Pa

ra

hi

pp

oc

am

pa

l^ g

yr

us

Pa

ra

hi

pp

oc

am

pa

l^ g

yr

us

Subgranular zoneSubgranular zone

C

er

eb

ra

lp

ed

un

cle

C

er

eb

ra

lp

ed

un

cle

Cen

g tral

ray

Cen

g tral

ray

Tr ochlear nerve? (IV)

Superior medullary velum

Dorsal teg-

mental nucleus

Dorsal teg-

mental nucleus

Mesencephalic

nucleus (V)

Mesencephalic

nucleus (V)

Medial longitudinal fasciculus

Dorsal longi-

tudinal fasciculus

Lateral migratory streamLateral migratory streamLateral migratory streamLateral migratory stream

Substantia

nigra

Reticular

formation

Reticular

fo rmation

A

M

Y

G

D

A

L

A

A

M

Y

G

D

A

L

A

AMYGDAMYGDALAALA

C

er

eb

ra

lp

ed

uncle

C

er

eb

ra

lp

ed

uncle

RRaphe nuclear comaphe nuclear complexplex

Oculomotor nerve? (III)

Medial lemniscus, spinocephalic,

and trigemino-thalamic tracts

Ve ntral tegmental area

Basolateral

complex

Basolateral

complex

Am

mo

n's

horn

Am

mo

n's

horn

Culmen (IVCulmen (IV-V-V ))

Centralis

(III)

Centralis

(III)

Anterior lobe

(HIV-HV )

Anterior lobe

(HIV-HV )

Superior

cerebellar

peduncle

Superior

cerebellar

peduncle

L

at

er

al

ve

nt

ri

cl

e

Uncinate

fasciculus

Uncinate

fasciculus

Par

abra

chia

nucleu l

s

Par

abra

chia

nucleu l

s

Pars compacta

Pars reticulata

D

e

n

at

te

g

y

r

us

D

e

n

at

te

g

y

r

us

SubiculuSubiculumm

E

nt

or

hin

alcortex

E

nt

or

hin

alcortex

En

to

rh

in

al

co

rte

x

En

to

rh

in

al

co

rte

x

S

u

b

ic

u

lu

m

S

u

b

ic

u

lu

m

A

m

m

o

n

's

ho

rn

A

m

m

o

n

's

ho

rn

S

u

b

ci

lu

u

m

S

u

b

ci

lu

u

m

Entorhinal

cort

ex

Entorhinal

cort

ex

Lateral migratory stream

(entering the basolateral complex)

Tearinsection

Germinal and transitional structuGerminal and transitional structurres ines in italicsitalics

CEREBELLUM

VVermisermis

HemispheHemispherree

Alvear

glioepithelium

Alve ar

glioepithelium

Parahippocampal neuroepithelium

and subventricular zone

Pa rahippocampal neuroepithelium

and subventricular zone

Parahippocampal

stratified transitional field

Pa rahippocampal

stratified transitional field

M

ID

B

R

A

IN

M

ID

B

R

A

IN

TE

G

M

E

N

TU

M

TE

G

M

E

N

TU

M

Subpial

granular

layer

PONSPONS

Fourth

ventricle

Fourth

ventricle

External

germinal layer

Cortical plate

White matter

Layer I

Layer II

Layer III

Layer IV

Layers V-VI

PPontine glioepithelium/ependymaontine glioepithelium/ependyma

Amygdaloid

glioepithelium/

ependyma

Amygdaloid

glioepithelium/

ependyma

Amygdaloid

glioepithelium/ependyma

Amygdaloid

glioepithelium/ependyma

Amygdaloid

glioepithelium/ependyma

Amygdaloid

glioepithelium/ependyma

PLATE 143B