The interface to Professor Warwick’s nervous system was a micro electrode array consisting of 100 individual electrodes implanted in the median nerve of the left arm. A 25-channel neural signal amplifier amplifies the signals from each electrode by a factor of 5000 and filters signals with corner frequencies of 250Hz and 7.5KHz. The amplified and finltered electrode signals are then delivered to the neural signal processor where they are digitized at 30,000 samples/second/electrode and scanned online for neural spike events. This means that only 25 of the total 100 channels can be viewed at any one time.
Neural spike events are detected by comparing the instantaneous electrode signal to level thresholhds set for each data channel. When a supra-threshold event occurs, the signal window surrounding the event is time stamped and stored for later, offline analysis. The neural stimulator allows for any of the 25 monitored channels to be electrically stimulated with a chosen repetition frequency at any one time.
The interface to Professor Warwick’s nervous system was a micro electrode array consisting of 100 individual electrodes implanted in the median nerve of the left arm. A 25-channel neural signal amplifier amplifies the signals from each electrode by a factor of 5000 and filters signals with corner frequencies of 250Hz and 7.5KHz. The amplified and finltered electrode signals are then delivered to the neural signal processor where they are digitized at 30,000 samples/second/electrode and scanned online for neural spike events. This means that only 25 of the total 100 channels can be viewed at any one time.
Neural spike events are detected by comparing the instantaneous electrode signal to level thresholhds set for each data channel. When a supra-threshold event occurs, the signal window surrounding the event is time stamped and stored for later, offline analysis. The neural stimulator allows for any of the 25 monitored channels to be electrically stimulated with a chosen repetition frequency at any one time.