Objective to research the orientational projections of the primary afferent fibers of the rat's femoral nerve to the substantia gelatinosa (SG) of spinal cord.

Objective To Study the distribution of primary afferent fibers of the sciatic and pelvic nerves in the dorsal commissural nucleus (DCN) of the rat lumbosacral spinal cord.

Under normal conditions some catecholaminergic fibers innervate primary afferent neurons and there is no significant functional communication between sympathetic fibers and sensory neurons.