front matter 1

Floor plateFloor plate

Central

canal

Ventral horn

interneurons

Ventral horn

interneurons

Intermediate

interneurons

Dorsal root

bifurcation zone

Fasciculus cuneatus

Fasciculus gracilis

Dorsal root

collateralization zone

Lissauer's

tract?

Lissauer's

tract?

Dorsal

funiculus

Dorsal

horn Substantia

gelatinosa

Substantia

gelatinosa

Migratory stream

of lateral horn

(autonomic)

motoneurons?

EpendymaEpendyma

Central

autonomic

area

Central

autonomic

area

Lamina ILamina I

Laminae

IV-V

Laminae

IV-V

Clarke's column?

Lateral horn

motoneurons

(autonomic)

trunktrunk

Ventral white

commissure

Ventral white

commissure

Ventral

median fissure

Dorsal intermediate septum?

Retreating roof plate

Dorsal median septum

V

e

n

t

r

a

l

funicu

lu

s

V

e

n

t

r

a

l

funicu

lu

s

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

Ventral horn

motoneuron

column

PLATE 24B