front matter 1

Roof

plate

Roof

plate

Floor plateFloor plate

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 Substantia

gelatinosa

Substantia

gelatinosa

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?

Dorsal root

Central canalCentral canal

neck and

upper trunk?

neck and

upper trunk?

wrist and

hand?

wrist and

hand?

shoulder?shoulder?

arm and

shoulder?

arm and

shoulder?

arm?arm?

forearm

and wrist?

forearm

and wrist?

forearm?forearm?

Dorsal median septum

Dorsal intermediate septum

Ventral median fissure

Ventral white

commissure

Ventral white

commissure

L a t e r a l f u n i c u l u s

L a t e r a l f u n i c u l u s V e n

t r a

l fun i c

u l u

s

V

e

n

t r a

l fun i c

u l u

s

Ventral horn

motoneuron

columns

Ventral horn

motoneuron

columns

PLATE 31B