R. Kanagasuntheram

Failure of reinnervation of Pacinian corpuscle after nerve crush

SummaryDenervated Pacinian corpuscles from the slow loris (Nycticebus coucang) obtained on the 49th and 75th post-operative days were subjected to electron microscopic investigation. Unremoved myelin debris occurred within the endoneurial tube during the early stages of regeneration and there was extensive fibrosis in the later stages. These factors may prevent the reinnervating nerve fibre from entering the corpuscle. The changes in the blood vessels may be due to disuse atrophy.

Sensory Nerve Terminations in the Oral Tissues of Some Pongidae

Sensory nerve terminations in the oral tissues of Symphalangus syndactylus and Pongo pygmaeus have been described and compared with those of tree shrew, slow loris, macaque and gibbon. In Pongo pygmaeus the endings were moderately positive for specific cholinesterase, strongly positive for non-specific cholinesterase and negative for alkaline phosphatase.