Electron microscope study on neurons occurring in the common peroneal nerve of rat and pigeon.

During an electron microscopical study of the common peroneal nerve of albino rats and pigeons, neurons were found along the course of the nerve. Their ultrastructural morphology was studied. On the basis of observed features, such as the occurrence of bare areas of the neurilemma, of thick processes of the perikarya (dendrites), and of synapses on the soma, it appears that these cells are aberrant sympathetic neurons which have migrated to a more distal position than usual.