Neural Mechanisms of Attentional Switching Between Pain and a Visual Illusion Task: A Laser Evoked Potential Study

• DOI: 10.1007/s10548-017-0613-8
• Publication Date: 2017-12-19T12:01:20Z
• Authors: Andrej Stancak; Nicholas Fallon; Alessandra Fenu; Katerina Kokmotou; Vicente Soto; Stephanie Cook
• Keywords: Stimulus (psychology)

Previous studies demonstrated that pain induced by a noxious stimulus during distraction task is affected both stimulus-driven and goal-directed processes which interact change over time. The purpose of this exploratory study was to analyse associations aspects subjective experience engagement with the distracting attention-sensitive components laser-evoked potentials (LEPs) on single-trial basis. A laser heat applied dorsum left hand while subjects either viewed Rubin vase-face illusion (RVI), or focused their associated somatosensory sensations occurring stimulated hand. Pain-related every were evaluated using set visual analogue scales. Factor analysis used identify principal dimensions experience. LEPs correlated basis multiple linear regression model. positive LEP component at vertex electrodes in interval 294-351 ms (P2) smaller focusing RVI than Single-trial amplitude variations P2 changes 1, representing essential pain, inversely 2, accounting for anticipated number figure reversals. source dipole located posterior region cingulate cortex strongest contributor attention-related component. Instantaneous switching attention towards presence are related strength experience, task, level pain. Results provide neurophysiological underpinning use analgesia acute relief.