磁刺激
脑电图
神经科学
心理学
刺激
麻醉
医学
听力学
作者
Enrico De Martino,Adenauer G. Casali,Silvia Casarotto,Gabriel Hassan,Mario Rosanova,Beatriz Couto,Thomas Graven‐Nielsen,Daniel Ciampi de Andrade
出处
期刊:Cold Spring Harbor Laboratory - medRxiv
日期:2024-01-23
标识
DOI:10.1101/2024.01.22.24301597
摘要
ABSTRACT Temporal dynamics of local cortical rhythms during acute pain remain largely unknown. The current study used a novel approach based on transcranial magnetic stimulation combined with electroencephalogram (TMS-EEG) to investigate evoked-oscillatory cortical activity during acute pain. Motor (M1) and dorsolateral prefrontal cortex (DLPFC) were probed by TMS, respectively, to record oscillatory power (event-related spectral perturbation and relative spectral power) and phase synchronization (inter-trial coherence) by 63 EEG channels during experimentally induced acute heat pain in 24 healthy participants. TMS-EEG was recorded before, during, and after noxious heat (Acute Pain condition) and non-noxious warm (Control condition), delivered in a randomized sequence. The main frequency bands (α, β1, and β2) of TMS-evoked potentials after M1 and DLPFC stimulation were recorded close to the TMS coil and remotely. Cold and heat pain thresholds were measured before TMS-EEG. Over M1, Acute pain decreased α-band oscillatory power locally and α-band phase synchronization remotely in parietal-occipital clusters compared with non-noxious warm (all P<0.05). The remote (parietal-occipital) decrease in α-band phase synchronization during Acute Pain correlated with the cold (P=0.001) and heat pain thresholds (P=0.023) and to local (M1) α-band oscillatory power decrease (P=0.024). Over DLPFC, Acute Pain only decreased β1-band power locally compared with non-noxious warm (P=0.015). Thus, evoked-oscillatory cortical activity to M1 stimulation is reduced by acute pain in central and parietal-occipital regions and correlated with pain sensitivity, in contrast to DLPFC, which had only local effects. This finding expands the significance of α and β band oscillations and may have relevance for pain therapies.
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