front matter 1

Roof plateRoof plate

Floor plateFloor plate

Dorsal

root

Dorsal

root

Ventral root

Lateral horn
motoneurons?

Lateral horn
motoneurons?

Ventral horn

interneurons

Ventral horn

interneurons

Intermediate

interneurons

Intermediate

interneurons

Dorsal root

bifurcation zone

Dorsal root

bifurcation zone

Dorsal median septum Fasciculus gracilis

Ventral median fissure

Dorsal root

collateralization zone

Lissauer's

tract?

Lissauer's

tract

Dorsal

funiculus

Dorsal

horn Substantia

gelatinosa

Substantia

gelatinosa

EpendymaEpendyma

Central

autonomic

area

Central

autonomic

area

Lamina ILamina I

Laminae

IV-V

Laminae

IV-V

Central canalCentral canal

Ventral white

commissure

Ventral white

commissure

Ventral gray

commissure

Ventral gray

commissure

Ventral horn

motoneuron?

Ventral horn

motoneuron?

L

a

t

e r a l f u n i c u l

u

s

L

a

t

e r a l f u n i c u l

u

s

V

e

ntralf

un

ic

u

lu

s

V

e

ntralf

un

ic

u

lu

s

PLATE 37B