Abstract: A cortical stimulator system is provided. The system may include; a stimulation device having a switch configured to selectively control various electrodes; and a user interface device operatively connected to the stimulation device for controlling the electronic switch and stimulation device, the cortical stimulator system configured to provide a report of provided stimulation. A method of operating a cortical stimulator may be provided. The method may include: connecting a set of probes to the cortical stimulator, selecting parameters regarding a signal to be sent to the set of probes, sending a signal to the set of probes; observing the response of a subject having the set of probes contacting the subjects brain when the signal is sent to the probes, entering the observed response into the cortical stimulator, associating the response to a specific set of probes, and generating a report describing the response and associated probes.

Abstract: Amplification of an evoked potential signal is carried out utilizing a high pass filter implemented as an integrator in a feedback loop which drives the DC offset voltage to zero. As a result, the feed-forward amplifier circuit has almost zero volts at its output since the only voltage remaining is the offset voltage of the operational amplifier, which is selected so as to maintain this parameter as low as possible. Because the voltage impressed across the feed-forward amplifier section is close to zero, the gain of this section can be set to zero during the time that the electrical stimulus pulse is present without introducing any additional artifacts and subsequent amplifier stages are not driven into saturation.