Changes in cortical oscillations linked to multisensory modulation of nociception
Mancini, F. and Longo, Matthew R. and Canzoneri, E. and Vallar, G. and Haggard, P. (2013) Changes in cortical oscillations linked to multisensory modulation of nociception. European Journal of Neuroscience 37 (5), pp. 768-776. ISSN 0953-816X.
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Pain can be modulated by several contextual factors. For example, simply viewing one’s own body can reduce pain, suggesting that the visual context may influence the processing of nociceptive stimuli. We studied changes in EEG oscillatory activity related to visual modulation of nociception, comparing cortical oscillations during innocuous or noxious contact heat, while participants viewed either their own hand or a neutral object at the same location. Viewing the body compared to viewing the object reduced intensity ratings of noxious stimuli, but not of innocuous heat. Time frequency analysis of EEG data revealed that noxious, as opposed to warm, stimulation was associated with reduced beta (15-25 Hz) power. Classically, such decreases in oscillatory power indicate increases in sensory cortical activation. These event-related oscillatory changes were moreover modulated by the visual context: viewing one’s own body increased noxious stimulation-induced beta oscillatory activity bilaterally, relative to viewing a neutral object, possibly indicating inhibition of cortical nociceptive processing. These results demonstrate that visual-nociceptive interactions involve changes in sensorimotor EEG rhythms.
|Keyword(s) / Subject(s):||electroencephalography, nociception, oscillations, pain, somatosensory, multisensory integration, body representation|
|School:||Birkbeck Schools and Departments > School of Science > Psychological Sciences|
|Research Centre:||Brain and Cognitive Development, Centre for (CBCD)|
|Depositing User:||Matthew Longo|
|Date Deposited:||25 Jan 2013 17:38|
|Last Modified:||02 Dec 2016 11:52|
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