front matter 1

VVentral funiculusentral funiculus

Central canal

surrounded by ependyma

Central canal

surrounded by ependyma

VVentral grayentral gray

Intermediate grayIntermediate gray

Dorsal root

bifurcation zone

Fasciculus gracilis

Dorsal root

collateralization zone

Lissauer's tract

Dorsal root

Lateral

funiculus

Lateral

funiculus

Lateral
corticospinal
tract?

Region of

very sparse

reactive glia

in the lateral

funiculus

(autonomic

fibers?)

Vestibulospinal tract?

Spinocephalic

tracts?

Dorsal grayDorsal gray

Myelinated terminals of

dorsal root collaterals

Dorsal funiculus

Intr

as

pi

na

l

tr

a

c

ts

?

Intr

as

pi

na

l

tr

a

c

ts

?

Incipient

subgelatinosal plexus

Incipient

subgelatinosal plexus

VVentral white commissureentral white commissure

VVentral gray commissureentral gray commissure

Dorsal median septum

Ventral

median fissure

See the matched cell body stained section in Plates 91A and B

PLATE 90B