A gustatory stimulator

Abstract

BackgroundIn order to elicit gustatory event related potentials (gERPs) a special taste delivery system is needed which allows precise control of stimulus onset and duration. New methodAim of this investigation was to describe the characteristics, namely onset rise-time step and onset delay time of a recently new taste delivery system based on stepper-motor, computer-driven glass syringes, able to spray pulses of liquid solutions into the mouth. ResultsThe measurement showed that the pulse rise time is less than 100ms and increases with the pulse duration; the delay of the stimulus on a 12m hose is between 55ms and 71ms. Comparison with existing methodsThe gustometer in examination produce a stream of pulses, constituted by a certain number of taste stimuli interleaved among a number of tasteless pulses, moreover the solution is thermos-regulated at internal body temperature. This make the technique appealing for event related procedure in neuroscience investigation related to gustatory tasks. ConclusionThese results of the time rise measurements confirm the suitability of this gustometer to elicit ERPs.