front matter 1

Roof plate

Floor plateFloor plate

Ventral funiculus

Ventral horn

motoneuron

columns

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

funiculus

Dorsal

horn Substantia

gelatinosa

Substantia

gelatinosa

Lateral funiculus

EpendymaEpendyma

Central autonomic area

Lamina ILamina I

Laminae

IV-V

Laminae

IV-V

Clarke's column?

Central canalCentral canal

Lateral horn motoneurons
(autonomic)

trunktrunk

Dorsal median septum

Ventral median fissure

Ventral white

commissure

Ventral white

commissure

Ventral gray

commissure

PLATE 33B