The Human Brain During the Third Trimester

GW29 Coronal

CR 260 mm

Y14-59

Level 3: Section 621

Superior frontal gyrus

Olfactory peduncle

Olfactory

sulcus

Subcallosal area

Cingulate

gyrus

Cingulum

Induseum

griseum

Fo rnix SeptumSeptum

Basal

ganglia

Basal

ganglia

Medial septal nucleus

Lateral septal nucleus

Corpus callosum (body)

Middle frontal gyrus

Inferior frontal gyrus

Orbital gyrus

Nucleus accumbens

Putamen

Insular gyrus

Superior and middle

temporal gyri

Claustrum

External capsule

Caudate (head)

Internal capsule (anterior limb)

Gyrus rectus

Interhemispheric fissure

Frontal

lobe

Frontal

lobe

Frontal

lobe

Frontal

lobe

Temporal

pole

Te mporal

pole

Lateral ve ntricle

1 Fr ontal neuroepithelium and subventricular zone

2 Fr ontal stratified transitional field

5 Fo rnical glioepithelium

4 Callosal sling

6 Rostral migratory stream

Accumbent neuroepithelium and subventricular zone (inter-

mingled with the rostral migratory stream and the frontal

neuroepithelium/subventricular zone)

7

10 Lateral migratory stream (cortical)

11 Subpial granular layer (cortical)

8 Anteromedial striatal neuroepithelium and subventricular zone

9 Anterolateral striatal neuroepithelium and subventricular zone

3 Callosal glioepithelium

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

33

11

22

22

44

55

6

88

99

10

11

77

Layer I

Cortical plate

White matter

Lateral fissure

PLATE 153