front matter 1

PLATE 94B

VVentral funiculusentral funiculus

Ventral horn

motoneurons

Ventral horn

motoneurons

Ventral horn

interneurons

Ventral horn

interneurons

Intermediate

interneurons

Intermediate

interneurons

Dorsal root

bifurcation zone

Fasciculus cuneatus

Fasciculus gracilis

Dorsal root

collateralization zone

Lissauer's tract

Dorsal funiculus

Dorsal

horn

Dorsal

horn Substantia

gelatinosa

Substantia

gelatinosa

Lateral funiculusLateral funiculus

Central

autonomic

area

Central

autonomic

area

Lateral

cervical

nucleus?

Lateral

cervical

nucleus?

Lamina ILamina I

Example of a sparse

proliferating glial concentration

(present throughout the white matter)

Laminae

IV-V

Laminae

IV-V

Central

cervical

nucleus?

Central

cervical

nucleus?

Central canal

surrounded by ependyma

Central canal

surrounded by ependyma

shoul- skull?skull?

der?

shoul-

der?

dia-

phragm?

dia-

phragm?

arm?arm?

Ventral white

commissure

Ventral white

commissure

VVentral gray commissureentral gray commissure

Dorsal intermediate septum

Dorsal median septum

Ventral

median fissure

See the matched myelin stained section in Plates 93A and B

The white matter in this cell body stained section and other sections in this specimen have a uniformly sparse population

of proliferating glia. Refer to the matching myelin stained section for the approximate locations of both corticospinal

tracts, the medial longitudinal fasciculus, the rubrospinal, lateral reticulospinal, vestibulospinal, tectospinal, intraspinal,

and spinocephalic tracts.