Cortical interaction of bilateral inputs is similar for noxious and innocuous stimuli but leads to different perceptual effects
| Autor: | Mathieu Piché, Stéphane Northon, Zoha Deldar |
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| Rok vydání: | 2021 |
| Předmět: |
Brain Mapping
N100 medicine.diagnostic_test business.industry Brain activity and meditation General Neuroscience media_common.quotation_subject Brain Electroencephalography Stimulation Stimulus (physiology) Hand Somatosensory system Laser-Evoked Potentials Evoked Potentials Somatosensory Perception Noxious stimulus medicine Humans business Neuroscience media_common |
| Zdroj: | Experimental Brain Research. 239:2803-2819 |
| ISSN: | 1432-1106 0014-4819 |
| Popis: | The cerebral integration of somatosensory inputs from multiple sources is essential to produce adapted behaviors. Previous studies suggest that bilateral somatosensory inputs interact differently depending on stimulus characteristics, including their noxious nature. The aim of this study was to clarify how bilateral inputs evoked by noxious laser stimuli, noxious shocks, and innocuous shocks interact in terms of perception and brain responses. The experiment comprised two conditions (right-hand stimulation and concurrent stimulation of both hands) in which painful laser stimuli, painful shocks and non-painful shocks were delivered. Perception, somatosensory-evoked potentials (P45, N100, P260), laser-evoked potentials (N1, N2 and P2) and event-related spectral perturbations (delta to gamma oscillation power) were compared between conditions and stimulus modalities. The amplitude of negative vertex potentials (N2 or N100) and the power of delta/theta oscillations were increased in the bilateral compared with unilateral condition, regardless of the stimulus type (P |
| Databáze: | OpenAIRE |
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