A Summary of Current and New Methods in Velocity Selective Recording (VSR) of Electroneurogram (ENG)

This paper describes the theory of velocity selective recording (VSR) of neural signals including some new developments. In particular new limits on available selectivity using band pass filters are introduced and discussed. Existing work has focussed primarily on electrically evoked compound action potentials (CAPs) where only a single evoked response per velocity is recorded. This paper extends the theory of VSR to naturally occurring neural signals recorded from rat and describes a practical method to estimate the level of activity (firing rates) within particular velocity ranges.