The Human Brain During the Third Trimester

Parolfactory

gyrus

GW37 Coronal

CR 350 mm

Y217-65

Level 7: Section 721

See detail of brain core

in Plates 33A and B.

1 Fr ontal neuroepithelium and subventricular zone

2 Fr ontal stratified transitional field

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

8 Anteromedial striatal neuroepithelium and subventricular zone

7 Anterolateral striatal neuroepithelium and subventricular zone

10 Diencephalic (thalamic) glioepithelium/ependyma

11 Diencephalic (preoptic) glioepithelium/ependyma

9 Strionuclear glioepithelium

12 Subpial granular layer (cortical)

4 Callosal sling

5 Fo rnical glioepithelium

6 Lateral migratory stream (cortical)

3 Callosal glioepithelium

Temporal

lobe

Te mporal

lobe

Induseum griseum

CCaauuddaattee ((bbooddyy))

Pu

ta

m

en

Pu

ta

m

en

In

ter

na

l c

ap

su

le

In

ter

na

l c

ap

su

le

Lateral fissure

Optic chiasm

Superior frontal gyrus

Middle frontal gyrus

Precentral gyrus

Postcentral gyrus

Central sulcus

Superior temporal gyrus

Middle temporal gyrus

Inferior temporal gyrus

Frontal

lobe

Frontal

lobe

Interhemispheric

fissure

Inferior frontal gyrus?

Insular gyrusInsular gyrus

Lateral

ventricl e

Fornix

Primary olfactory

cortex (piriform)

Primary olfactory

cortex (piriform)

White

matter

Cortical plate

Layer I

33

1111

55

66

66

66

77

88

22

11

Cingulate

gyrus

Cingulate

gyrus

CingulumCingulum

Basal

ganglia

Basal

ganglia

99

1010

Preoptic

area

Preoptic

area

Globus

pallidus

Glob us

pallidus

Bed nucleus of the

stria terminalis

Bed nucleus of the

stria terminalis

Endopiriform

nucleus

Endopiriform

nucleus

Olfactory

tubercle

Olfactory

tubercle

Third Third ventriclventriclee

Paracentral

lobule

Paracentral

lobu le

44

Anterior

commissure

Anterior

commissure

CorCorpus callosupus callosumm

Damaged areas in section

Claustrum

(infiltrated by the

lateral migratory

stream)

12

PLATE 7