[Brain evoked potentials as correlates of neural dysfunction in the myofascial pain syndrome]

To study the peculiarities of nervous system functioning in the conditions of nociceptive afferentation from myofascial trigger points in the myofascial pain syndrome (MFPS), 130 patients, 57 men and 73 women, aged from 20 to 55 years, have been examined. A method of somatosensory evoked potentials (SSEP) with recording of amplitudes and latencies of their main components has been used. Two relevant conclusions based on the results of the study have been made: 1) the similar parameters of SSEP components before and after stopping the MFPS have a different neurophysiologic basis; 2) during the treatment, several variants of changes of SSEP parameters reflecting the interaction of different neurophysiological mechanisms can be found.