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 cuneatus

Fasciculus gracilis

Dorsal root

collateralization zone

Lissauer's

tract

Lissauer's

tract

Dorsal root with
dense glia in
boundary cap

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

Central canal

surrounded by ependyma

Central canal

surrounded by ependyma

middle

trunk?

middle

trunk?

Dorsal median septum

Dorsal intermediate septum

VVentral gray commissureentral gray commissure

VVentral white commissureentral white commissure

Ventral median fissure

See the matched myelin stained section in Plates 82A and B

The white matter in this section has a uniformly sparse population of proliferating glia, and no fi ber tracts in the

ventral and lateral funiculi stand out with a different glial concentration. This suggests that myelination gliosis is

fi nished. Refer to the matching myelin stained section for the approximate locations of the lateral corticospinal,

ventral corticospinal, rubrospinal, lateral reticulospinal, vestibulospinal, intraspinal, and spinocephalic tracts.

PLATE 83B