The Human Brain During the Third Trimester

Level 21: Section 1241

Level 22: Section 1281

Pyramid

Inferior olive

Corticospinal tract

Solitary nuclear complex

Pyramid

Central canal

Cuneate nucleus

Spinal nucleus and tract (V)

Corticospinal tract Gracile nucleus

Hypoglossal nucleus (XII)

Lateral reticular nucleus

Choroid plexus

Inferior cerebellar peduncle

and spinocerebellar tracts

MedullaMedulla

CEREBELLUM

(hemisphere )

Inferior olive

Medulla

GW30 Horizontal, CR 260 mm, Y187-65

1 External germinal layer (cerebellum)

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

CEREBELLUMCEREBELLUM

HemispheHemispherree

1

1

See high magnification view in Plates 149A and B

(right panel).

See high magnification view in Plates 150A and B

(left panel).

Damaged areas in section

PLATE 130