front matter 1

Sp

in

oc

ep

h

al

ic

tr

a

c

t

s

?

Sp

in

oc

ep

h

al

ic

tr

a

c

t

s

?

VVentral funiculusentral funiculus

VVentral grayentral gray

Intermediate grayIntermediate gray

Lateral

funiculus

Lateral

funiculus

Vestibulospinal tract?

Rubrospinal

tract?

Rubrospinal

Dorsal grayDorsal gray tract?

Dorsal root

Ventral corticospinal tract?

Fasciculus gracilis

Myelinated terminals of Fasciculus cuneatus

dorsal root collaterals

Dorsal funiculus

Dorsal root bifurcation zone

Dorsal root collateralization zone

Lissauer's

tract

Central canal

surrounded by ependyma

Central canal

surrounded by ependyma

S

p

in

o

c

e

r

e

b

e

l

l

a r t r a c t s?

S

p

in

o

c

e

r

e

b

e

l

l

a r t r a c t s?

In

tr

as

p

in

a

l

t

r

a

c

t

s

?

In

tr

as

p

in

a

l

t

r

a

c

t

s

?

Subgelatinosal pleSubgelatinosal plexusxus

Reticulated areaReticulated area

Lateral

reticulospinal tract?

Lateral

reticulospinal tract?

VVentral white commissureentral white commissure

VVentral gray commissureentral gray commissure

Dorsal median septum

Ventral

median fissure

Dorsal intermediate septum

myelination

gradient

myelination

gradient

myelinationgradient

Lateral

corticospinal

tract

Lateral

corticospinal

tract

See the matched cell body stained section in Plates 83A and B

This section and Plate 80 show the gradient of sparse to very sparse

reactive glia in the lateral corticospinal tract (separated by a dashed

line within the lateral corticospinal tract). On the right side, the cir-

cular area of more dense reactive glia may be the rubrospinal tract.

PLATE 82B