front matter 1

GW8.5

CR 36 mm

M2050

Sacral

Cell body stain

Sacral/Coccygeal

Cell body stain

Spinal canal .0184

Neuroepithelium .0647

Roof plate .0135

Floor plate .0066

Gray matter .3275

White matter .1913

Spinal canal .0089

Neuroepithelium .0386

Roof plate .0052

Floor plate .0029

Gray matter .1962

White matter .1389

Areas (mm^2 )

Areas (mm^2 )

PLATE 20A