[Estimation of hypoalgesia by the cerebral evoked potentials method]

The authors used the method of somatosensory evoked potentials for estimating hypoalgesia obtained by stimulation of exteroceptors (by electrostimulation and acupuncture) and telereceptors (by phonostimulation and photostimulation). Estimation of hypoalgesia was performed at a remote site from the stimulated receptors and owing to this it was possible to confirm a general analgesic effect of all these methods. The method of evoked cortical potentials may be useful for estimation of hypoalgesia which manifests itself as a slight prolongation of latency (by several msec.) in most tested individuals in 6 successive potential waves. For estimation of the hypoalgesia the environmental conditions must be kept unchanged and the apparatus must be of highest quality.