ABSTRACT
Name Myelination
Reactive glia Proliferating glia
DORSAL FUNICULUS:
DORSAL ROOT VENTRAL ROOT
LATERAL and VENTRAL FUNICULI:
dorsal root col. zone --- SparseMyelinated
Myelinated Myelinated
fas. gracilis --- SparseMyelinated fas. cuneatus --- SparseMyelinated
intraspinal tracts --- DenseMany fibers
spinocephalic tracts Very sparse• DenseSome fibers† lat. reticulospinal tract Very sparse SparseSome fibers
spinocerebellar tracts --- SparseMyelinated
med. long. fasiculus --- SparseSome fibers vestibulospinal tract --- SparseSome fibers
dorsal root bif. zone Many fibers* Sparse
---
Sparse**
---
---
---
ven. commissure Myelinated Dense---
Lissauer's tract Sparse--- None
lat. cortricospinal tract Sparse--- Very sparse ven. cortricospinal tract Sparse--- Very sparse
** dense band in a sparse field (part of the boundary cap?) * intermingled in a bed of nonreactive glia † few fibers at the cervical level • peripheral fibers at the cervical level
Plates 84A, 84B Lower Thoracic Total Area: 7.7961 mm2
Plates 85A, 85B Lower Thoracic
Total Area: 8.2168 mm2
Plates 82A, 82B Upper Thoracic Total Area: 10.177 mm2
Plates 83A, 83B Upper Thoracic
Total Area: 10.514 mm2
Plates 86A, 86B Upper Lumbar Total Area: 11.735 mm2
Plates 87A, 87B Upper Lumbar
Total Area: 12.730 mm2
Plates 88A, 88B Lumbar Enlargement Total Area: 12.152 mm2
Plates 90A, 90B Sacral/Coccygeal Total Area: 5.6792 mm2
Plates 89A, 89B Lumbar
Enlargement Total Area:
12.162 mm2
Plates 80A, 80B Cervical Enlargement Total Area: 20.063 mm2
Plates 81A, 81B Cervical
Enlargement Total Area:
21.370 mm2
Plates 91A, 91B Sacral/Coccygeal
Total Area: 5.9052 mm2
Central canal .0029 Ependyma .0119 Gray matter 6.9875 White matter 13.0610
c e p h
a l i c
c t s
Tectospinal tract? Medial longitudinal fasciculus?
