front matter 1

AABBBCCC

DD

EE

FF

GG

HH

CR 3.3 mm

CR 4.0 mm

CR 8.0 mm

CR 10.5 mm

CR 19.1 mm

CR 22.0 mm

CR 36.0 mm

CR 56.0 mm

0.25 mm

1 mm

1 mm

1 mm

1 mm

1 mm

0.5 mm 0.5 mm

Dorsal hor

n

Dorsal horn

Inter

mediate g

ray

Intermediate gray

Ventr

al hor

n

Ventral horn

Dorsal neuroepitheliumDorsal neuroepithelium

Inter

mediate neuroepithelium

Intermediate neuroepithelium

Ventr

al neuroepithelium

Ventral neuroepithelium

Roof plateRoof plate

Floor plate

Gray

matter

Gray

matter

Outside edge of the spinal cord

(transparent envelope)

Dorsal hor

n

Dorsal horn

Inter

mediate g

ray

Intermediate gray

Ventr

al hor

n

Ventral horn

Overview of Spinal Cord Development – GW3.5 to GW14 FIGURE 2