VVentral funiculusentral funiculus
Ventral
corticospinal
tractVentral
corticospinal
tract
Ventral horn
motoneuronsVentral horn
motoneuronsVentral horn
interneuronsVentral horn
interneuronsIntermediate
interneuronsIntermediate
interneuronsDorsal root
bifurcation zoneDorsal rootDorsal rootVVentral rootentral rootFasciculus cuneatusDorsal root boundary capExample of dense proliferating gliaExample of sparse proliferating gliaExample of very sparse proliferating gliaFasciculus gracilisDorsal root
collateralization zoneLissauer's tractLissauer's tractDorsal funiculus
Dorsal
horn
Dorsal
horn
Substantia
gelatinosaSubstantia
gelatinosaLateral
funiculus
Lateral
funiculus
EpendymaEpendymaCentral
autonomic
areaCentral
autonomic
areaLateral
cervical
nucleusLateral
cervical
nucleusLamina ILamina ILaminae
IV-VLaminae
IV-VCentral
cervical
nucleus?Central
cervical
nucleus?Lateral cortico-
spinal tractLateral cortico-
spinal tractCentral canalCentral canalS
p
i
n o c e r e b e ll a r t r a c tsS
p
i
n o c e r e b e ll a r t r a c tsneck?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 commissureVentral median fissureDorsal median septum
Dorsal intermediate septumOnly the corticospinal and spinocerebellar tracts can be clearly delineated in the ventral and lateral funiculi. The cortico-
spinal tracts stand out as clear areas with very sparse proliferating glia. The spinocerebellar tracts have a more dense con-
centration of proliferating glia. A sparse population of proliferating glia fi lls the remaining ventral and lateral funiculi and
contains several fi ber tracts (unlabeled in this section). Refer to the matching myelin stained section for the approximate
locations of the medial longitudinal fasciculus, tectospinal, vestibulospinal, intraspinal, and spinocephalic tracts.See the matched myelin stained section in Plates 47A and B
PLATE 48B