A method for diagnosing non-visible (occult) maladies in a human patient, the method comprising: (a) deploying at least two electrodes spaced apart on the skin of the patient； (b) detecting and recording a bioelectrical signal in and around said electrodes, the bioelectrical signal being a stochastic signal； (c) transforming the stochastic signal into a voltage versus frequency spectra using a Fast Fourier Transform (FFT) algorithm； (d) comparing a graph of a resultant FFT level of the patient to at least one graph of a baseline FFT level； and (e) determining a presents of a non-visible (occult) malady based on said comparison. Methods for monitoring a treatment regimen for non-visible (occult) maladies and for modulating the amplitude of endogenous bioelectrical stochastic signals in a human patient are also disclosed.
