The Human Brain During the Third Trimester

Paramedian

lobule

GW26 Sagittal

CR 225 mm

Y147-63

Level 9: Section 261

Lateral

ventricle

L

at

er

al

ve

n

tr

ic

le

Lateral

ventricle

Substantia

innominata

Substantia

innominata

Claustrum

Primary olfactory cortex (piriform)

Orbital gyrusOrbital gyrus

Parietal

lobe

Parietal

lobe

Frontal

lobe

Frontal

lobe

Temporal

lobe

Te mporal

lobe

BBaassaall ggaanngglliiaa

Occipital

lobe

Occipital

lobe

Cortical plate

Postcentral gyrus

Precentral gyrus

White matter

Cere bellum

(hemisphere )

Ansiform

lobule

(crus II)

Ansiform

lobu le

(crus II)

Paramedian

lobu le

Ansiform

lobule

(crus I)

Ansiform

lobu le

(crus I)

11

22

33

33

44

55

66

88

88

1010

1313

15

16

15

16

15

1414

1111

1111

1212

99

77

77

Central sulcus

Globus

pallidus

Globus

pallidus

Corona

radiata

Corona

radiata

Corona

radiata

Corona

radiata

Choroid

plexus

Choroid

plexus

Int

ern

alc

aps

ule(

ante

rior

limb)

Int

ern

alc

aps

ule(

ante

rior

limb)

Thalamus

POS-

TERIOR

COMPLEX

Thalamus

POS-

TERIOR

COMPLEX

H

ip

po

ca

m

pu

s

H

ip

po

ca

m

pu

s

Internalc

apsul

e(po

ster

ior

lim

b)

Internalc

apsul

e(po

ster

ior

lim

b)

In

te

rn

al

ca

p

su

le

A

m

y

gd

a

la

A

m

y

gd

a

la

Putame nPutame n

P

a

ra

centr

a

l

lo

b

u

le

P

a

ra

centr

a

l

lo

b

u

le

9 Alve ar glioepithelium

12 Amygdaloid glioepithelium/ependyma

11 Lateral migratory stream (cortical)

10 Subgranular zone (dentate)

13 Po sterior striatal neuroepithelium and subventricular zone

14 Strionuclear glioepithelium

5 Occipital neuroepithelium and subventricular zone

6 Occipital stratified transitional field

7 Te mporal neuroepithelium and subventricular zone

8 Te mporal stratified transitional field

3 Pa rietal neuroepithelium and subventricular zone

Remnants of the germinal matrix, migratory streams, and transitional fields

15 External germinal layer (cerebellum)

16 Subpial granular layer (cortical)

1 Fr ontal stratified transitional field

2 Pa racentral stratified transitional field

4 Pa rietal stratified transitional field

Layer I

See detail of brain core in Plates 208A and B.

Damaged areas in section

Caudate

(tail)

Caudate

(tail)

PLATE 198