Med Biol Eng Comput - The theory of velocity selective neural recording: a study based on simulation.

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Resumo

This paper describes the improvements to the theory of velocity selective recording and some simulation results. In this method, activity in different groups of axons is discriminated by their propagation velocity. A multi-electrode cuff and an array of amplifiers produce multiple neural signals; if artificial delays are inserted and the signals are added, the activity in axons of the matched velocity are emphasized. We call this intrinsic velocity selective recording. However, simulation shows that interpreting the time signals is then not straight-forward and the selectivity Q(v) is low. New theory shows that bandpass filters improve the selectivity and explains why this is true in the time domain. A simulation study investigates the limits on the available velocity selectivity both with and without additive noise and with reasonable sampling rates and analogue-to-digital conversion parameters. Bandpass filters can improve the selectivity by factors up to 7 but this depends on the speed of the action potential and the signal-to-noise ratio.

Resumo Limpo

paper describ improv theori veloc select record simul result method activ differ group axon discrimin propag veloc multielectrod cuff array amplifi produc multipl neural signal artifici delay insert signal ad activ axon match veloc emphas call intrins veloc select record howev simul show interpret time signal straightforward select qv low new theori show bandpass filter improv select explain true time domain simul studi investig limit avail veloc select without addit nois reason sampl rate analoguetodigit convers paramet bandpass filter can improv select factor depend speed action potenti signaltonois ratio

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