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

Dorsal rootDorsal root

Fasciculus cuneatus

Dorsal root

boundary cap

Fasciculus gracilis

Dorsal root

collateralization zone

Lissauer's

tract

Dorsal funiculus

Dorsal

horn

Dorsal

horn

Substantia

gelatinosa

Substantia

gelatinosa

Lateral

funiculus

Lateral

funiculus

EpendymaEpendyma

Central

autonomic

area

Central

autonomic

area

Lateral

cervical

nucleus

Lateral

cervical

nucleus

Lamina ILamina I

Laminae

IV-V

Laminae

IV-V

Central

cervical

nucleus?

Central

cervical

nucleus?

Central canalCentral canal

Lateral cortico-

spinal tract

Lateral cortico-

spinal tract

V

entral root

Ventral root

Ventral

corticospinal

tract

Ventral

corticospinal

tract

S

p

i

n o c e r e b e l l a r t r a c t

s

S

p

i

n o c e r e b e l l a r t r a c t

s

Example of dense proliferating glia

Example of sparse proliferating glia

Example of very sparse proliferating glia

neck?neck?

shoulder?shoulder?

arm?arm?

forearm?forearm?

wrist?wrist?

wrist and

hand?

wrist and

hand?

digits?digits?

VVentral gray commissureentral gray commissure

VVentral white commissureentral white commissure

Ventral median fissure

Dorsal median septum

Dorsal intermediate septum

Refer to the matching myelin stained section for the approxi-

mate locations of the medial longitudinal fasciculus, tectospi-

nal, vestibulospinal, intraspinal, and spinocephalic tracts.

PLATE 50B

See the matched myelin stained section in Plates 49A and B