Regular ArticleRole of Operculoinsular Cortices in Human Pain Processing: Converging Evidence from PET, fMRI, Dipole Modeling, and Intracerebral Recordings of Evoked Potentials
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Non-invasive insular stimulation for peripheral neuropathic pain: Influence of target or symptom?
2022, Neurophysiologie CliniqueCitation Excerpt :The evoked pain cluster is related to symptoms concentrated around NPSI items assessing evoked pain phenomena such as pain after mechanical touch and due to cold stimulation. There is a wide literature on the role of the insula after thermal stimulation in healthy volunteers [34], and it has been shown that in patients with syringomyelia, discrete patterns of cortical fMRI are found after pain evoked by normally non painful stimuli, including the posterior insula and the adjacent parietal operculum and parts of S2 [18]. One of the theories supporting the effect of PSI-rTMS on nociception thresholds [16,30] and in clinical pain [24] is based on putative overriding effects (of 10 Hz stimulation for rTMS) on PSI local activity and disruption of its pro-nociceptive tonus.
Early nociceptive evoked potentials (NEPs) recorded from the scalp
2021, Clinical NeurophysiologyCitation Excerpt :Additional scalp recording sites would have been necessary to provide a definite evidence about the distribution of N40, but our study was not aimed at obtaining a detailed map of the early waves, which will be investigated in future research. On the other hand, the very different latency ranges of the components and techniques of stimulus presentation do not allow comparisons with previous works on scalp distribution and depth recordings (Frot et al., 2014; Hu et al., 2014; Peyron et al., 2002; Valeriani et al., 2004), as they were focused on slower nociceptive afferents and late cortical events. Stimulation of the radial area with the unselective 1000 IDE evoked a cortical response (SEP) similar to the one obtained after stimulation of the nerve trunks, starting with the N20 component, albeit of smaller amplitude, confirming previous reports (Leandri et al., 2018).
Inhibition of cortical somatosensory processing during and after low frequency peripheral nerve stimulation in humans
2021, Clinical Neurophysiology
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