Abstract: The present invention relates to a computer-implemented method for modifying nociception in a subject using electroencephalographic data acquired from the brain of a subject, the method comprising the steps of: receiving electroencephalographic data comprising at least two electroencephalographic signals measured simultaneously from at least two electroencephalogram channels, computing a Fourier transform of the at least two electroencephalographic signals on a temporal window; averaging complex Fourier coefficients in the frequency band of alpha waves; computing an alpha phase concentration neuromarker on consecutive epochs of the electroencephalographic data, generating a sensorial stimulus representing alpha phase concentration neuromarker using an output generator. The present invention also relates to a method for training a subject to reinforce self-modulation of pain pathways.