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

Central canal

surrounded by ependyma

Central canal

VVentral grayentral gray surrounded by ependyma

Intermediate grayIntermediate gray

Lateral

funiculus

Lateral

funiculus

Tectospinal tract?

Medial longitudinal fasciculus?

Vestibulospinal tract?

Dorsal grayDorsal gray

Myelinated ventral rootlets

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 tract

Lateral

corticospinal tract

In

traspi

n

a

l

t

r

a

c

ts

?

In

traspi

n

a

l

t

r

a

c

ts

?

Sp

in

oc

er

eb

e

ll

a

r

tr

a

c

ts

?

Sp

in

oc

er

eb

e

ll

a

r

tr

a

c

ts

?

Incipient

subgelatinosal

plexus

Incipient

subgelatinosal

plexus

Reticulated

area

Reticulated

area

Myelinated proximal

axons of ventral horn

motoneurons

Myelinated proximal

axons of ventral horn

motoneurons

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 66A and B

PLATE 65B