Abstract: Cognitive impairments caused by chronic sleep deprivation can be ameliorated by frequent brief naps, but the effect depends on accumulated sleep debt and timing, duration and sleep architecture of the naps.

Naps would likely be more effective if their sleep architecture, timing and duration could be tailored with respect to the accumulated sleep debt and previous naps. Real-time assessment of sleep architecture using a minimal number of EEG channels and dry electrodes is a pre-requisite for such an approach. With an intention of developing a device for optimizing naps in operational environments (Figure 1), we developed algorithms for real-time sleep staging using a single (Fp1-Fp2) EEG channel.

Popovic D., J. R., Westbrook P., et al. (2009). "Automated Sleep Staging in Real Time using a Single EEG Channel (Fp1-Fp2) on the Forehead." Sleep. 32: A383.