front matter 1

Sp

in

oc

ep

h

al

ic

tr

a

c

ts

Sp

in

oc

ep

h

al

ic

tr

a

c

ts

VVentral funiculusentral funiculus

VVentral grayentral gray

Intermediate grayIntermediate gray

Lateral

funiculus

Lateral

funiculus

Vestibulospinal tract?

Dorsal

gray

Dorsal

gray

Myelinated terminals of

dorsal root collaterals

Dorsal funiculus

Lateral corticospinal tract

(myelinating)

(myelinated)

Dorsal root

Dorsal root

bifurcation zone

Fasciculus cuneatus

Fasciculus gracilis

Dorsal root

collateralization zone

Lissauer's

tract

Lissauer's

tract

Central canal

surrounded by ependyma

Central canal

surrounded by ependyma

Sp

in

o

c

e

re

b

e

ll

a

r

tr

a

c

st

Sp

in

o

c

e

re

b

e

ll

a

r

tr

a

c

st

I

n

tr

aspin

a

l

tr

a

ct

s

I

n

tr

aspin

a

l

tr

a

ct

s

Subgelatinosal pleSubgelatinosal plexusxus

Reticulated areaReticulated area

myelination
gradient

myelination
gradient

Ventral median fissure

Dorsal median septum

Dorsal intermediate septum

VVentral gray commissureentral gray commissure

VVentral white commissureentral white commissure

Lateral

reticulospinal

tract?

Lateral

reticulospinal

tract?

See the matched cell body stained section in Plates 109A and B

PLATE 108B