front matter 1

VVentral funiculusentral funiculus

Ventral

corticospinal

tract

Ventral

corticospinal

tract

Ventral horn

motoneurons

Ventral horn

motoneurons

Ventral horn

interneurons

Ventral horn

interneurons

Intermediate

interneurons

Intermediate

interneurons

Dorsal root

bifurcation zone

Superficial fasciculus gracilis

Deep fasciculus gracilis

Dorsal root

collateralization zone

Lissauer's

tract

Dorsal funiculus

Dorsal

horn

Substantia

gelatinosa

Substantia

gelatinosa

Lateral

funiculus

Lateral

funiculus

Central autonomic areaCentral autonomic area

Lamina ILamina I

Laminae

IV-V

Laminae

IV-V

Lateral

corticospinal

tract

Lateral

corticospinal

tract Central canal

with surrounding ependyma

Central canal

with surrounding ependyma

lower

trunk?

lower

trunk?

thigh?thigh? hip?hip?

leleg?g? hip?hip?

ankle?ankle?

foot?foot?

thigh?thigh?

Ventral white

commissure

Ventral white

commissure

Ventral gray

commissure

Ventral gray

commissure

Ventral median fissure

Dorsal median septum

See the matched myelin stained section in Plates 73A and B

Refer to the matching myelin stained section for the

approximate locations of the lateral reticulospinal,

vestibulospinal, intraspinal, and spinocephalic tracts.

PLATE 74B