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A Simple Pattern of Movement Is Not Able to Inhibit Experimental Pain in FM Patients and Controls: An sLORETA Study

Applied Neurophysiology and Pain Unit, SMBNOS Department, Bari Aldo Moro University, Polyclinic General Hospital, 70121 Bari, Italy
Physical Therapy Department, University of Granada, 18016 Granada, Spain
Author to whom correspondence should be addressed.
Brain Sci. 2020, 10(3), 190;
Received: 14 February 2020 / Revised: 9 March 2020 / Accepted: 23 March 2020 / Published: 24 March 2020
(This article belongs to the Special Issue Emerging Treatment Approaches for Chronic Pain Syndromes)
Motor cortex activation seems to induce an analgesic effect on pain that would be different between patients with fibromyalgia (FM) and control subjects. This study was conducted to analyze the changes of the laser-evoked potentials (LEPs) induced during a finger tapping task in the FM patients and the controls employing a multi-dipolar analysis according to Standardized low resolution brain electromagnetic tomography (sLORETA) method. The LEPs from 38 FM patients and 21 controls were analyzed. The LEPs were recorded while subjects performed a slow and a fast finger tapping task. We confirmed that the difference between N1, N2 and P2 wave amplitudes between conditions and groups was not significant. In control subjects, the fast finger tapping task induced a modification of cortical source activation in the main areas processing laser stimulation from the moving hand independently from the movement speed. In summary, a simple and repetitive movement is not able to induce consistent inhibition of experimental pain evoked by the moving and the not moving hand in each group. It could interfere with LEP sources within the limbic area at least in control subjects, without inhibit cortical responses or explain the different pattern of motor and pain interaction in FM patients. View Full-Text
Keywords: laser-evoked potentials; chronic pain; motor activity laser-evoked potentials; chronic pain; motor activity
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Gentile, E.; Ricci, K.; Vecchio, E.; Libro, G.; Delussi, M.; Casas-Barragàn, A.; de Tommaso, M. A Simple Pattern of Movement Is Not Able to Inhibit Experimental Pain in FM Patients and Controls: An sLORETA Study. Brain Sci. 2020, 10, 190.

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