chapter  3
48 Pages

THE SECOND TRIMESTER

Plates 34A, 34B Lower Thoracic Section 1741 Total area: 1.6474 mm2

Plates 35A, 35B Upper Lumbar Section 1821 Total area: 2.7717 mm2

Plates 36A, 36B Lumbar Enlargement Section 1901 Total area: 3.8584 mm2

Plates 37A, 37B Sacral/ Coccygeal Section 2061 Total area: 1.6071 mm2

Central canal .0053 Neuroepithelium .0182 Roof plate .0290 Floor plate .0029 Gray matter 2.5381 White matter 1.6037

Roof plate

Floor plate

Central canal

Ventral horn interneurons

Intermediate interneurons

Dorsal root bifurcation zone

Fasciculus cuneatus Fasciculus gracilis

Dorsal root collateralization zone

Lissauer's tract?