Resumen
Method for monitoring the level of alert in real time based on brain waves and device for putting it into practice. The method is based on the capture of the electroencephalography signal of the subject (eeg) through an egg recording system (1) and by means of three dry electrodes (4) through which they are recorded in monopolar mode. Any of the c3, c4, cz, o1 and o2 sites of the cerebral cortex. The registered signal is filtered, proceeding to record the alpha rhythm of the subject in a relaxed state. Once said alpha behavior is determined, the eeg of the same is registered before any activity that is being carried out, proceeding to the normalization in amplitude with respect to its maximum value of the registered spectra. Subsequently a second normalization is performed based on the registered alpha behavior, and from that spectrum a variable is determined that allows a discrimination of the alert level by simple thresholding, and that corresponds to the quotient between the power in the personal upper band and the personal alpha band. (Machine-translation by Google Translate, not legally binding)