Cognitive Augmentation Via Multimodal Sensing and Auricular Neurostimulation

The stimulation frequency, pulse width, and amplitude will be varied in order to determine the optimal stimulation conditions for elongating the period of peak subject performance during the experimental tasks. Amplitude, pulse width, and frequency meet or exceed International Electrotechnical Commission (IEC) 60601-2-10:2016 requirements. The amplitude range specified is selectable for either channel with any frequency and pulse width combination. We will test an amplitude range of 0 mA - 5.0 mA. We will test a frequency range of 1 Hz - 150 Hz. We will test a pulse width range of 50 μs - 750 μs. The study coordinator should apply neurostimulation when the reported cognitive state metric corresponding to the performance task reaches different thresholds. These thresholds will be determined before execution of the study and will be chosen to maximize the likelihood of discovering an optimal trigger for neurostimulation based on reported cognitive state.

Modulation of stimulation frequency and amplitudes outside of the known physiological effective ranges during intervention periods.