PERIODIC NOXIOUS HEAT, INNOCUOUS COLD AND INNOCUOUS VIBROTACTILE STIMULATION INDUCE SIMILAR MODULATIONS OF THETA, ALPHA AND BETA BAND EEG OSCILLATIONS

Courtin, Arthur;et.al.
(2022) Pain in Europe XII – the 12th Congress of the European Pain Federation EFIC® — Location: Dublin (27.April.2022)

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Background and aims: Using frequency tagging, Colon et al. (2017) found that periodic noxious heat stimuli elicits periodic modulations of the magnitude of ongoing EEG oscillations in theta, alpha and beta frequency bands. Our study aimed to assess whether these responses are specific for heat pain by comparing heat-evoked responses to the responses elicited by innocuous cold and mechanical vibrations. Methods: Twenty subjects participated to two experimental sessions, one for foot dorsum and one for volar forearm stimulation. Stimuli consisted in fifteen 200ms pulses delivered at 0.25Hz. Fourteen stimuli of each modality were delivered per session. Thermal stimuli were delivered using a contact thermode. Target temperatures were 10°C and 60°C for cold and hot stimulation, respectively. Vibrotactile stimulation (200Hz) were delivered using a round-tipped piezo-electric actuator. The EEG was recorded at 1024Hz using 66 electrodes. Hilbert transforms were used to assess the envelope of theta-, alpha- and beta-band oscillations. Frequency tagging was used to reconstruct the amplitude of the periodic response. Cluster based permutation tests were used to assess whether these amplitudes were larger than 0. Results: Periodic modulations of the theta, alpha and beta bands were observed for all modalities and limbs. For a given limb, the topographies of these modulations were similar for all modalities and modulations observed during upper limb stimulation had similar topographies to those reported by Colon et al. Conclusions: Periodic noxious heat, innocuous cold and innocuous vibrations all induce similar periodic modulations of theta, alpha and beta band oscillations
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Courtin, A., & et al. (2022). PERIODIC NOXIOUS HEAT, INNOCUOUS COLD AND INNOCUOUS VIBROTACTILE STIMULATION INDUCE SIMILAR MODULATIONS OF THETA, ALPHA AND BETA BAND EEG OSCILLATIONS. Pain in Europe XII – the 12th Congress of the European Pain Federation EFIC®, Dublin. https://hdl.handle.net/2078.5/27499