Abstract:
—Meditation is a mental practice to achieve focus of
mind and emotional clarity. Meditation has been used for
cognitive enhancement, rehabilitation and reducing stress and
anxiety. In the present study, we are doing a comparative
analysis between various levels of meditators based on EEG as
psychophysiological indicator; and possibility of EEG as a
neurofeedback for meditators. An analytical experiment on
three categories of subjects (A: an expert meditator, B: five
moderate meditators and C: five non-meditators) was done.
Each subject was guided to perform two visual tasks; first to sit
relaxed with eyes closed (REC) and second to gaze on a dot on
screen (RDOT); supplied, EEG being recorded in parallel. The
first subject was recorded with absorbed state of meditation
(Samādhi). For psychophysiological analysis, wavelet transform
based features from each recording of EEG was evaluated.
Topographical mapping of brain functioning based on features
were plotted and analyzed. It was observed that theta, alpha
and beta were comparatively higher for expert meditator in
frontal and central region during REC and RDOT. Also,
during absorbed meditative state, the alpha and beta are higher
at midline central region (Cz) and theta is higher at C3 and C4.
