The dorsal propriospinal tract is a collection of

nerve fiber An axon (from Greek ἄξων ''áxōn'', axis) or nerve fiber (or nerve fibre: see spelling differences) is a long, slender projection of a nerve cell, or neuron, in vertebrates, that typically conducts electrical impulses known as action pot ...

s, ascending, descending, crossed and uncrossed, that interconnect various levels of the

spinal cord The spinal cord is a long, thin, tubular structure made up of nervous tissue that extends from the medulla oblongata in the lower brainstem to the lumbar region of the vertebral column (backbone) of vertebrate animals. The center of the spinal c ...

. It is a component of the white

posterior column Posterior may refer to: * Posterior (anatomy), the end of an organism opposite to anterior ** Buttocks, as a euphemism * Posterior horn (disambiguation) * Posterior probability The posterior probability is a type of conditional probability that ...

Myelinated Myelin Sheath ( ) is a lipid-rich material that in most vertebrates surrounds the axons of neurons to insulate them and increase the rate at which electrical impulses (called action potentials) pass along the axon. The myelinated axon can be lik ...

fibers are located adjacent to the spinal central gray. Shorter fibers are closer to, longer fibers further from the gray. Some fibers are unmyelinated and scattered through the posterior column. The tract is one of three

propriospinal tracts Propriospinal tracts are three tracts, collections of nerve fibers ascending, descending, crossed and uncrossed, that interconnect various levels of the spinal cord. They are located in the white columns ( funiculi) of the spinal cord where the colu ...

in which most pathways intrinsic to the spinal cord are located. The others are the

ventral propriospinal tract Ventral propriospinal tract is a collection of nerve fibers, ascending, descending, crossed and uncrossed, that interconnect various levels of the spinal cord. It is a component of the white anterior columns. The fibers are largely myelinated and r ...

and the

lateral propriospinal tract Lateral propriospinal tract is a collection of nerve fibers, ascending, descending, crossed and uncrossed, that interconnect various levels of the spinal cord. Its fibers are largely myelinated. It is a component of the white lateral columns. Most ...

References

External links

* More information a
BrainInfo
Central nervous system pathways {{neuroanatomy-stub