front matter 1

Sp

in

oc

ep

h

a

li

c

tr

a

c

t

s

Sp

in

oc

ep

h

a

li

c

tr

a

c

t

s

VVentral funiculusentral funiculus

Ventral

gray

Ventral

gray

Intermediate

gray

Intermediate

gray

Lateral

funiculus

Lateral

funiculus

Vestibulospinal tract?

Dorsal

gray

Dorsal

gray

Lateral corticospinal tract
(dense reactive glia)
(myelinating)
(myelinated)

Myelinated terminals of

dorsal root collaterals

Dorsal funiculus

Dorsal root bifurcation zone

Fasciculus gracilis

Dorsal root collateralization zone

Lissauer's

tract

Lissauer's

tract

Subgelatinosal pleSubgelatinosal plexusxus

Reticulated areaReticulated area

myelination

gradient

myelination

gradient

I

n

t

r

a

sp

inal t

ra

c

ts

I

n

t

r

a

sp

inal t

ra

c

ts

S

p

i

n

o

c

e

r

e

b

e

ll

a

r

tr

a

c

st

S

p

i

n

o

c

e

r

e

b

e

ll

a

r

tr

a

c

st

Ventral median fissure

Dorsal median septum

VVentral gray commissureentral gray commissure

VVentral white commissureentral white commissure

Central canal

surrounded by ependyma

Central canal

surrounded by ependyma

Lateral

reticulospinal

tract?

Lateral

reticulospinal

tract?

Myelinated fibers

in Clarke's column

Myelinated fibers

in Clarke's column

See the matched cell body stained section in Plates 111A and B

PLATE 110B