front matter 1

VVentral funiculusentral funiculus

Central canal surrounded

by ependyma

Central canal surrounded

by ependyma

Lateral horn

motoneurons

Lateral horn

motoneurons

Ventral horn

interneurons

Ventral horn

interneurons

Intermediate

interneurons

Intermediate

interneurons

Dorsal

horn

Substantia

gelatinosa

Lateral

funiculus

Lateral

funiculus

Central autonomic areaCentral autonomic area

Lamina I

Laminae

IV-V

Clarke's

column

Clarke's

column

Dorsal root

bifurcation zone

Superficial fasciculus gracilis

Deep fasciculus gracilis

Dorsal root

collateralization zone

Lissauer's

tract

Lissauer's

tract

Dorsal funiculus

Lateral

corticospinal

tract?

Lateral

corticospinal

tract?

trunk?trunk?

trunk?trunk?

hip?hip? trunk?trunk?

hip?hip?

leleg?g?

VVentral horn motoneuronsentral horn motoneurons

Sp

in

oc

er

eb

el

la

r

tr

ac

ts

Sp

in

oc

er

eb

el

la

r

tr

ac

ts

Dorsal median septum

Ventral median fissure

VVentral gray commissureentral gray commissure

VVentral white commissureentral white commissure

Refer to the matching myelin stained section

for the approximate locations of the vestibulo-

spinal, intraspinal, and spinocephalic tracts.

PLATE 57B

See the matched myelin stained section in Plates 56A and B