front matter 1

VVentral funiculusentral funiculus

Ventral horn

motoneurons

Ventral horn

motoneurons

Ventral horn

interneurons

Ventral horn

interneurons

Intermediate

interneurons

Intermediate

interneurons

Dorsal root

bifurcation zone

Fasciculus gracilis

Dorsal root

collateralization zone

Lissauer's

tract

Lissauer's

tract

Dorsal funiculus

Dorsal

horn

Dorsal

horn

Substantia

gelatinosa

Substantia

gelatinosa

Lateral

funiculus

Lateral

Lateral horn funiculus

motoneurons

Lateral horn

motoneurons

Lamina ILamina I

Laminae

IV-V

Laminae

IV-V

ClarkClarke's columne's column Central

autonomic

area

Central

autonomic

area

central

trunk?

central

trunk?

Central canal

surrounded by ependyma

Central canal

surrounded by ependyma

Dorsal median septum

Ventral white

commissure

Ventral white

commissure

Ventral gray

commissure

Ventral gray

commissure

Ventral

median fissure

See the matched myelin stained section in Plates 110A and B

Refer to the matching myelin stained section for the approximate

locations of the lateral corticospinal tract, the lateral reticulospi-

nal, vestibulospinal, intraspinal, and spinocephalic tracts.

PLATE 111B