The Human Brain During the Third Trimester

Ins

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la

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GW26 Sagittal

CR 225 mm

Y147-63

Level 10: Section 221

Lateral fissure

Primary olfactory cortex (piriform)

Orbital gyrusOrbital gyrus

Parietal

lobe

Parietal

lobe

Parietal

lobe

Parietal

lobe

Frontal

lobe

Frontal

lobe

Frontal

lobe

Frontal

lobe

Temporal

lobe

Te mporal

lobe

BBaassaall ggaanngglliiaa

Cortical plate

Precentral

gyrus

Precentral

gyrus

Postcentral

gyrus

Po stcentral

gyrus

White matter

Cere bellum

(hemisphere )

Ansiform

lobule

(crus II)

Ansiform

lobu le

(crus II)

Ansiform

lobule

(crus I)

Ansiform

lobu le

(crus I)

11

22

33

33

44

44

55

55

66

Central sulcus

Am

yg

da

la

Am

yg

da

la

Corona

radiata

Corona

radiata

Corona

radiata

Corona

radiata

Chor

oid

plexus

Chor

oid

plexus

Lateral

ventricle

Lateral

ventricle

P

a

r

a

c

en

tral

lo

b

u

le

P

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r

a

c

en

tral

lo

b

u

le

S

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p

re

io

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m

di

d

le

,

a

n

d

in

fe

ri

o

r

fr

on

ta

lg

yr

i

S

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p

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m

di

d

le

,

a

n

d

in

fe

ri

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fr

on

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yr

i

77

9

88

10

10

10

PutamenPutamen

Internal

capsule

Internal

capsule

Fi

m

br

ia

Fi

m

br

ia

CaudatCaudatee

Ins

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la

r

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s

Insular

gyrus

Insular

gyrus

Cl

au

str

um

Cl

au

str

um

6 Amygdaloid glioepithelium/ependyma

5 Lateral migratory stream (cortical)

8 Strionuclear glioepithelium

7 Po sterior striatal neuroepithelium and subventricular zone

3 Te mporal neuroepithelium and subventricular zone

4 Te mporal stratified transitional field

1 Pa rietal neuroepithelium and subventricular zone

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

9 External germinal layer (cerebellum)

10 Subpial granular layer (cortical)

2 Pa rietal stratified transitional field

10

Layer I

Damaged areas in section

See detail of brain core in Plates 209A and B.

PLATE 199