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

Dorsal funiculus

Dorsal

horn

Dorsal

horn

Substantia

gelatinosa

Substantia

gelatinosa

Lateral

funiculus

Lateral

funiculus

Central

autonomic

area

Central

autonomic

area

Lateral horn
motoneurons

Lateral horn
motoneurons

Lamina ILamina I

Laminae

IV-V

Laminae

IV-V

Displaced

Clarke's column

neuron

Displaced

Clarke's column

neuron

Clarke's

column

Clarke's

column

Central canal

surrounded by ependyma

Central canal

surrounded by ependyma

central

trunk?

central

trunk?

central

trunk?

central

trunk?

Ventral white

commissure

Ventral white

commissure

VVentral gray commissureentral gray commissure

Dorsal median septum

Ventral

median fissure

See the matched myelin stained section in Plates 98A and B

Refer to the matching myelin stained section for the approximate locations of the lateral corticospinal tract,

the rubrospinal, lateral reticulospinal, vestibulospinal, intraspinal, and spinocephalic tracts.

PLATE 99B