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Abstract
Abstract A 16-channel two-mode recording system used for detection of neurochemical and neuroeletrical signals was developed. The instrument system consists of hardware and software components whose current and voltage resolutions are 10 pA and 0.6 μV, respectively. The software adopted multithreading, multicache, and other techniques to achieve real-time detection, spike separation, IIR filter, chronoamperometry, cyclic voltammetry, etc. The performance of the system was demonstrated in electrophysiological experiment and dopamine concentration measurement. The signal-to-noise ratio ( S/N ) recorded from VTA of SD rat was 9.7. The current response increased linearly with the concentration of dopamine in the range of 0.1–378 μM with a correlation coefficient of 0.9958. The results indicated that the recording system had high resolution and was suitable for electrophysiological and the electrochemical signal detection.
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