front matter 1

Sp

in

o

c

e

p

h

a

l

i

c

t

r

a

c

t

s

?

Sp

in

o

c

e

p

h

a

l

i

c

t

r

a

c

t

s

?

VVentral funiculusentral funiculus

VVentral grayentral gray

Intermediate grayIntermediate gray

Dorsal root

bifurcation zone

Superficial fasciculus cuneatus

Deep fasciculus cuneatus

Superficial fasciculus gracilis

Deep fasciculus gracilis

Dorsal root

collateralization zone

Lissauer's

tract

Lateral

funiculus

Lateral

funiculus

EpendymaEpendyma

Vestibulospinal tract?

Dorsal grayDorsal gray

Dorsal funiculus

Central canalCentral canal

Ventral

corticospinal

tract

Ventral

corticospinal

tract

corticospinalLateral

tract

corticospinalLateral

tract

Ventral rootlets

(myelinated)

Ventral root

No reactive glia

Myelinating?

Dense reactive glia

Sparse reactive glia

Examples of reactive glia densities

and myelination

VVentral gray commissureentral gray commissure

VVentral white commissureentral white commissure

Ventral

median

fissure

Dorsal median septum

Dorsal intermediate septum

In

tr a s

p

i

n

a

l

t

r

a

c

t

s

?

In

tr a s

p

i

n

a

l

t

r

a

c

t

s

?

S p i n o c e r e b e l l a r t r a c t s

S p i n o c e r e b e l l a r t r a c t s

PLATE 51B

See the matched cell body stained section in Plates50A and B