The Human Brain During the Third Trimester

Alve ar glioepithelium

Subgranular zone

External germinal layer

Subpial granular layer

External germinal layer

Decli

v

e

VI

F

oliu

m

VIIa

Pyramis

VIII

Reticular

formation

C

e

r

e

b

r

a

l

p

ed

uncle

Uncu sUncu s

O

p

tic

c

h

ia

sm

O

p

tic

ch

ia

sm

B

a

so

la

te

r

a

l

c

o

m

p

le

x

B

a

so

la

te

r

a

l

c

o

m

p

le

x

Uncinate

fasciculus

Uncinate

fasciculus

D

en

ta

te

g

yru

s

D

en

ta

te

g

yru

s

Dentate gyrusDentate gyrus

Molecular laMolecular layeyerr

Granular laGranular layeyerr

HilusHilus

Superior

cerebellar

peduncle

Superior

cerebellar

peduncle

Middle and

inferior cerebellar peduncles

Middle and

inferior cerebellar peduncles

Middle

cerebellar

peduncle

Fastigial

nucleus

Fa stigial

nucleus

Fastigial

nucleus

Fa stigial

nucleus

Interpositus

nucleus

Interpositus

nucleus

Dentate nucleuDentate nucleuss

Superior cerebellar peduncle

(at base of red nucleus)

Para-

hippocampal

gyrus

Para-

hippocampal

gyrus

RRaapphhee^ nnuuccleleaarr^ ccoommpplelexx

Stria

terminalis

Stria

terminalis

Central

nucleus

Central

nucleus

Ammon's hor

n

(CA1

)

Ammon's hor

n

(CA1

)

S

u

b

ic

u

lu

m

S

u

b

ic

u

lu

m

SubiculumSubiculum

S

u

b

ic

u

lu

m

S

u

b

ic

u

lu

m

Entor

hinal^

cortex

Entor

hinal^

cortex

Medial longitudinal

fasciculus

Medial longitudinal

fasciculus

TTectospinal tractectospinal tract

Dorsal longitudinal fasciculuDorsal longitudinal fasciculuss

Inter

• 
  

culapedun-

r

nucleu

s

Inter

• 
  

culapedun-

r

nucleu

s

AMYGDAMYGDALAALA

PPO N SO N S

HYPOHYPOTHALAMUSTHALAMUS

HHIIPPPPOOCCAAMMPPUUSS

Declive

VI

Fo

liu

m

VIIa

Pyramis

VIII

Centralis

III

Centralis

III

Anterior lobe

HI-HV

Anterior lobe

HI-HV

Simplex

lobule

HVI

Simplex

lobu le

HVI

Mesencephalic nuc. (VMesencephalic nuc. (V))

Locus coeruleuLocus coeruleuss

Mesencephalic nucleus (VMesencephalic nucleus (V))

PPontine grayontine gray

oP

tn

ni

e

rg

ya

oP

tn

ni

e

rg

ya

Po

ntin

e^ g

ray

Po

ntin

e^ g

ray

Oculomotor nerve (III)?

Reticular

formatio n

B

a

s

o

la

te

r

a

l

c

o

m

p

le

x

B

a

s

o

la

te

r

a

l

c

o

m

p

le

x

Stria

terminalis

Stria

terminalis

PParabrachial nucleusarabrachial nucleus

Primary fissure

Primary

fissure

Primary

fissure

Dorsal tegmental nucDorsal tegmental nuc..

Ventral

tegmental

nuc.

Ve ntral

tegmental

nuc.

M

ed

ia

lle

mn

isc

us

M

ed

ia

lle

mn

isc

us

Laterall

em

ni

scu

s

Laterall

em

ni

scu

s

C

e

r

e

b

r

a

l

p

ed

uncleSpinocephalic tractSpinocephalic tract

PPontine glioepithelium/ependymaontine glioepithelium/ependyma

reC

be

le

al

r

d

e

e

p

n

u

c

le

i

reC

be

le

al

r

d

e

e

p

n

u

c

le

i

Third ventricle

(infundibu lar recess)

Arcuate nucleus

Lateral vLateral ventriclentriclee

oF

ru

ht

ve

nt

.

oF

ru

ht

ve

nt

.

uS

ep

oir

r

m

de

.

ve

lum

uS

ep

oir

r

m

de

.

ve

lum

PParabrachial nuc.arabrachial nuc.

C

e

r

e

b

r

a

l

p

ed

un

cle

C

e

r

e

b

r

a

l

p

ed

un

cle

VERMISVERMIS

HEMISPHEREHEMISPHERE

CEREBELLUM

Lateral migratory

stream (percolates

through the uncinate

fasciculus)

Parahippocampal

neuroepithelium,

subventricular zone, and

stratified transitional field

Pa rahippocampal

neuroepithelium,

subventricular zone, and

stratified transitional field

Te mporal neuroepithelium and subventricular zone

Temporal stratified

transitional field

Te mporal stratified

transitional field

White matter

Cortical plate

Layer I

Germinal and transitional structures in italics

Temporal

lobe

Temporal

lobe

Ansiform lobule

(Crus I HVIIA)

Ansiform lobu le

(Crus I HVIIA)

Diencephalic (hypothalamic)

glioepithelium/ependyma

Diencephalic (hypothalamic)

glioepithelium/ependyma

Amygdaloid

glioepithelium/

ependyma

Amygdaloid

glioepithelium/

ependyma

Amygdaloid

glioepithelium/

ependyma

Amygdaloid

glioepithelium/

ependyma

PLATE 90B