front matter 1

Sp

in

oc

ep

h

al

ic

tr

a

ct

s?

Sp

in

oc

ep

h

al

ic

tr

a

ct

s?

VVentral funiculusentral funiculus

VVentral grayentral gray

Intermediate grayIntermediate gray

Lateral

funiculus

Lateral

funiculus

Dorsal grayDorsal gray

Dorsal rootDorsal root

Vestibulospinal tract?

Dorsal funiculus

Dorsal root bifurcation zone

Superficial fasciculus cuneatus

Deep fasciculus cuneatus

Superficial fasciculus gracilis

Deep fasciculus gracilis

Dorsal root collateralization zone

Lissauer's tract

Myelinating terminals of
dorsal root collaterals

V

entral

corticospinal tract

Ventral

corticospinal tract

Lateral

corticospinal

Lateraltract

corticospinal

tract

Central canal

surrounded by ependyma

Central canal

surrounded by ependyma

Intrasp

in

al

tr

ac

ts

?

Intrasp

in

al

tr

ac

ts

?

S

p

in

o

c

e

re

b

e

ll

a

r

tr

a

c

st

?

S

p

in

o

c

e

re

b

e

ll

a

r

tr

a

c

st

?

Incipient

subgelatinosal

plexus

Incipient

subgelatinosal

plexus

Reticulated areaReticulated area

Dorsal median septum

Dorsal intermediate septum

Ventral median fissure

VVentral white commissureentral white commissure

VVentral gray commissureentral gray commissure

Lateral

reticulospinal

tract?

Lateral

reticulospinal

tract?

See the matched cell body stained section in Plates 70A and B

PLATE 69B