front matter 1

Roof plate

Floor plateFloor plate

Ventral funiculus

Central canal

Ventral horn

motoneuron

columns

Lateral horn
motoneurons
(autonomic)

Ventral horn
interneurons

Ventral horn
interneurons

Intermediate
interneurons

Dorsal root

bifurcation zone

Dorsal root

bifurcation zone

Fasciculus gracilis

Dorsal root

collateralization zone

Lissauer's

tract?

Lissauer's

tract?

Dorsal

Dorsal funiculus

horn Substantia

gelatinosa

Substantia

gelatinosa

Lateral funiculus

EpendymaEpendyma

Central autonomic area

Lamina ILamina I

Laminae

IV-V

Laminae

IV-V

Clarke's column

trunktrunk

Dorsal median septum

Ventral median fissure

Ventral white

commissure

Ventral white

commissure

Ventral gray

commissure

Ventral gray

commissure

PLATE 34B