The task of estimating the functional state of the CNS with the pain syndrome in patients with anxious phobic disorders is examined. For solving the task, the methods of spectral and multifractal analyses of EEG segments are applied during the perception of psychogenic pain and its removal by the psychorelax ation technique. It has been demonstrated that contrary to power spectra, singularity spectra allow distin guishing EEGs quantitatively in the examined functional states of the brain. Pain suppression in patients with anxious phobic disorders during psychorelaxation is accompanied by changing the width of the singularity spectrum and approximation of the multifractal parameter to the value corresponding to healthy subjects.
The present work examines the change in color reflection in psychogenic pain in patients with somatoform disorders (SFD) during psychotherapeutic treatment, for which empatho-techniques were used. At the start and end of the course the psychophysiological condition was determined according to psychological parameters and assessment of bioelectrical brain activity. All initial indicators for the patients significantly differed from those for the healthy subjects. At the same time, color reflection in the psychogenic pain was characterised by colors in the longwave part of the spectrum, in contradistinction to healthy subjects for whom achromatic and shortwave colors predominated. After the completed course patients with SFD had a significant improvement of all psychophysiological indicators and a lack of color reflectons in the longwave part of the spectrum. The data obtained permits the proposition that there exists a link between the psychogenic pain, its color reflection and anxiety, and also changes in the functional condition of the CNS.
In the work there are presented results of the investigation offeatures of the alteration of thresholds of the post-stimulus pain and its subjective characteristics in patients with phantom pain syndrome and psychogenic pain in the process of empatho-technique. There was studied the role ofpsychophysiological autoregulation in the restoration of sensitivity in patients undergone to amputation of lower extremities. The use of empatho-technique was found to allow not only to significantly reduce the intensity ofphantom, and psychogenic pain, but to fully restore sensitivity to ultrasonic stimuli in the psychogenic pain and significantly eliminate cases of its disturbance in the phantom pain. It is assumed that the reducing influence of empatho-technique on the intensity of the perception ofpain can be realized by means of activation of the antinociceptive system, enhancement of its inhibitory effect on the painful stimulus, as well as decline in the activation of the nociceptive system, with a subsequent decrease in the intensity of sensations ofpain and restoration of sensitivity.
The results of the research of the chronic pain structure of somatogenic and psychogenic origin were presented in this article. Psychogenic component was revealed in the structure of the anginal pain of chronic character in patients with coronary heart disease (CHD). The content of a psychogenic component was expectedly lower in CHD patients than in patients with chronic pain of the psychogenic origin. At the same time, somatogenic component was discovered in patients with psychogenic pain that could confirm the mixed nature of chronic pain of the psychogenic origin. The determination of the chronic pain structure allows to understand mechanisms of its formation better and to find more effective methods of its management.
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