The Human Brain During the Third Trimester

Level 23: Section 1351

Level 24: Section 1391

Central canal

Cuneate nucleus

Spinal nucleus and tract (V)

Spinal nucleus and tract (V)

Lateral corticospinal tract

Gracile nucleus

Cuneate fasciculus

Gracile fasciculus

Pyramid

Pyramid

Corticospinal

tract

Pyramidal decussation

Corticospinal tract

Medulla

Medulla

Central canal

GW30 Horizontal, CR 260 mm, Y187-65

See high magnification view in Plates 150A and B

(middle panel).

See high magnification view in Plates 150A and B

(right panel).

1

1

2

1 Dorsal funicular myelination gliosis

2 Ve ntral funicular myelination gliosis

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

PLATE 131