front matter 1

Sp

in

o

c

e

p

h

a

li

c

tr

a

c

ts

?

Sp

in

o

c

e

p

h

a

li

c

tr

a

c

ts

?

VVentral funiculusentral funiculus

VVentral grayentral gray

Intermediate grayIntermediate gray

Superficial fasciculus gracilis

Deep fasciculus gracilis

Dorsal root collateralization zone

Lateral

funiculus

Lateral

funiculus

Vestibulospinal tract?

Dorsal grayDorsal gray

Ventral rootlets

Dorsal funiculus

Central canal

surrounded by ependyma

Central canal

surrounded by ependyma

Dorsal root bifurcation zone

Lissauer's

tract

Myelinating terminals of

dorsal root collaterals

Ventral corticospinal tract?

Lateral

corticospinal

tract

Lateral

corticospinal

tract

Lateral
reticulospinal
tract?

Lateral
reticulospinal
tract?

Dorsal rootDorsal root

Intraspi

na

l

tr

ac

ts

?

Intraspi

na

l

tr

ac

ts

?

Myelinated proximal

axons of ventral horn

motoneurons

Myelinated proximal

axons of ventral horn

motoneurons

Incipient

subgelatinosal

plexus

Incipient

subgelatinosal

plexus

Reticulated

area

Reticulated

area

Dorsal median septum

Ventral median fissure

VVentral white commissureentral white commissure

VVentral gray commissureentral gray commissure

See the matched cell body stained section in Plates 76A and B

PLATE 75B