REGENERATION OF ASCENDING SPINAL AXONS IN GOLDFISH

Regeneration of descending spinal cord tracts occur spontaneously in a dult goldfish. Very little information is available regarding the fate of ascending fibers. Using Dextran amines as a tracer, we studied the normal and regenerated ascending axonal projection patterns in adult goldfish brain nuclei. Present study includes spinal projections to to rus semicircularis, hypothalamus, thalamus and the telencephalon. Rege nerated fibers had finer caliber axone and the terminal axonal arbors covered a larger area than the corresponding normal ones. (C) 1998 Els evier Science B.V.