Informed Cooperative Adaptive Line Enhancer for Detection of Spindles from Sleep EEG

Sleep spindles are bursts of oscillations that often appear in a number of electroencephalogram (EEG) channels. However, they mostly appear around the mid-line of the brain on both centro-parietal (for early spindles) and frontal (for late spindles) zones of the brain. In this paper for the first time a cooperative adaptive line enhancer is introduced in order to exploit the distributed and periodic nature of the spindle sources. In the proposed system the cooperation parameters are estimated based on evaluation of brain connectivity through S-transform. The outcome shows how the proposed approach can capture the entire duration of sleep spindles compared to all previous techniques based on single-channel spindle detection.