# Wireless system for recording evoked potentials

## TL;DR

A wireless system was developed to record evoked potentials with adjustable stimulation and recording parameters.

## Contribution

A custom wireless system with an Android app for real-time control of evoked potential experiments.

## Key findings

- The system enabled precise and wireless control of stimulation and recording parameters.
- The recording unit displayed signals faithfully with low internal noise.
- Evoked field potentials in rat dentate gyrus increased with stimulation pulse amplitude and duration.

## Abstract

Experiments measuring evoked potentials require flexible and rapid adjustment of stimulation and recording parameters. In this study, we have developed a recording system and an associated Android application that allow making such adjustments wirelessly. The system consists of 3 units: for stimulation, recording and control. Most of the modules in this system are custom made, although the stimulator and tablet are off-the-shelf products. When installed on the tablet, our Android application allows wireless communication with the control unit from a distance of 5 m. In testing, the recording unit had low internal noise and displayed signals faithfully. Upon receiving commands from the control unit, the stimulation unit produced precisely timed pulse outputs. Using this system, we were able to record evoked field potentials in the dentate gyrus of a rat; responses increased as expected with increasing stimulation pulse amplitude and duration.