The Human Brain During the Third Trimester

GW29 Coronal

CR 260 mm

Y14-59

Level 5: Section 741

Superior frontal gyrus

Cingulate

gyrus

Cingulum

Induseum

griseum

Basal gangliaBasal ganglia

SeptumSeptum

Middle frontal gyrus

Inferior

frontal gyrus

PutamenPutamen

ClaustruClaustrumm

ExterExternal capsulnal capsulee

Globus

pallidus

Globus

pallidus

Lateral fissure

Inferior temporal gyrus

Primary olfactory

cortex (piriform)

Primary olfactory

cortex (piriform)

Endopiriform nucleus

Ca

ud

at

e (^) (
he
ad
)
Ca
ud
at
e (^) (
he
ad
)
Inter
nal capsule
Inter
nal capsule
Interhemispheric fissure
Frontal
lobe
Frontal
lobe
Temporal
lobe
Te mporal
lobe
Preoptic
area
Preoptic
area
Olfa
ctory tu
berc
le
Olfa
ctory tu
berc
le
In
su
la
r
gy
ru
s
In
su
la
r
gy
ru
s
Diagonal band of
Broca (horizontal limb)
Third ve ntricle
(preoptic recess)
Basal nucleus
of Meynert
Basal nucleus
of Meynert
Anterior
amygdaloid
area?
Anterior
amygdaloid
area?
Lat
eral
ve
nt
ri
cl
e
Lat
eral
ve
nt
ri
cl
e
FFornixornix
FFornixornix
Optic chiasmOptic chiasm
Bed nuc. of
stria terminalis
Bed nuc. of
stria terminalis
Anterior
commissure
Anterior
commissure
Substantia
innominata
Substantia
innominata
1 Fr ontal neuroepithelium and subventricular zone
2 Fr ontal stratified transitional field
5 Fo rnical glioepithelium
4 Callosal sling
10 Subpial granular layer (cortical)
6 Strionuclear glioepithelium
9 Lateral migratory stream (cortical)
7 Anteromedial striatal neuroepithelium and subventricular zone
3 Callosal glioepithelium 8 Anterolateral striatal neuroepithelium and subventricular zone
Remnants of the germinal matrix, migratory streams, and transitional fields
33
11
22
44
55
66
88
99
1010
77
C
or
pu
sca
llosum
C
or
pu
sca
llosum
Layer I
Cortical plate
White matter
Prim
aryolfac
to
yr
roc
xet
Prim
aryolfac
to
yr
roc
xet
See detail of brain core
in Plates 176A and B.
Superior temporal gyrus
Middle temporal gyrus
Fusiform gyrus
Parolfactory/parahippocampal gyrus
Damaged areas in section
PLATE 155