Dishabituation of laser-evoked EEG responses: dissecting the effect of certain and uncertain changes in stimulus spatial location.

Experimental Brain Research
D M E TortaG D Iannetti

Abstract

The repetition of nociceptive stimuli of identical modality, intensity and location at short (1 s) and constant inter-stimulus interval (ISI) determines a strong habituation of the corresponding electroencephalographic (EEG) responses. To understand what determines this response habituation, we (1) examined the effect of introducing a selective change in the spatial location of the repeated stimulus (i.e., without altering its modality, intensity and timing), and (2) dissected the relative contribution of bottom-up, stimulus-driven spatial changes and top-down, cognitive expectations of such a change. Multichannel EEG was recorded while participants received a triplet of stimuli (S1-S2-S3) delivered to the hand dorsum at 1-s ISI. S3 was delivered either to the same hand as S1 and S2 or to the other hand, and participants were either explicitly informed or not informed of the location of S3. We found that, unlike the introduction of a change in the sensory modality of the repeated stimulus (Valentini et al. in J Cogn Neurosci 23:2822-2837, 2011), introducing a change in its spatial location did not produce a significant dishabituation of the laser-evoked N1, N2 and P2 peaks, but only a small amplitude increase following the P2 p...Continue Reading

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Citations

Nov 16, 2014·Experimental Brain Research·Chen ZhaoLi Hu
Oct 9, 2012·Neurophysiologie clinique = Clinical neurophysiology·V LegrainE Valentini
Aug 8, 2015·Cerebral Cortex·M MoayediG D Iannetti
Aug 28, 2014·European Journal of Pain : EJP·E CarlinoF Benedetti
Nov 12, 2014·PloS One·Elia ValentiniSalvatore Maria Aglioti
Apr 3, 2020·Brain Sciences·Anita Ribeiro Blanchard, William Edgar Comfort
Dec 18, 2020·The European Journal of Neuroscience·Mattia GaliganiFrancesca Garbarini
Dec 12, 2020·Cortex; a Journal Devoted to the Study of the Nervous System and Behavior·Mattia GaliganiFrancesca Garbarini

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