[Study on the intraspinal cord regeneration of sensory fibers sectioned in the posterior root of the cat].

In order to assess the potential ability for posterior column fibers to repair, cat sensory root fibers where their repair is known to be possible. Progress of the outgrowth of fibers into the spinal cord (posterior columns) was tested by observation of the animals, histological investigation of the roots, examination of the posterior columns on cross-section at various levels, and by electrological investigation of conduction from root to spinal cord. The results obtained indicate that repair of root fibers may continue into the spinal cord, both segmentally and all along the posterior columns. These results are discussed and compared with failure of repair of posterior column fibers after spinal cord section.