Intraneural recording for neuroprosthetic use: normal action potential shapes and blocking effects

For neuroprosthetic use of afferent activity, model results and experimental recordings of action potentials (ap´s) made with tungsten micro electrodes in rat peroneal/sural nerve are presented and compared. The model shows that the normal shape can be as well biphasic as triphasic, depending on extraneural conductivity. In the experiments, five classes of ap shapes are observed, of which two are seen in the model too; part of the other shapes may be tentatively ascribed to propagation-block or propagation-start phenomena