Self-touch modulates the somatosensory evoked P100

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Hogendoorn, H; Kammers, M; Haggard, P; Verstraten, FDate
2015-10-01Source Title
Experimental Brain ResearchPublisher
SPRINGERAffiliation
Melbourne School of Psychological SciencesMetadata
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Journal ArticleCitations
Hogendoorn, H., Kammers, M., Haggard, P. & Verstraten, F. (2015). Self-touch modulates the somatosensory evoked P100. EXPERIMENTAL BRAIN RESEARCH, 233 (10), pp.2845-2858. https://doi.org/10.1007/s00221-015-4355-0.Access Status
Open AccessAbstract
It has recently been shown that contact between one's own limbs (self-touch) reduces the perceived intensity of pain, over and above the well-known modulation of pain by simultaneous colocalized tactile input Kammers et al. (Curr Biol 20:1819-1822, 2010). Here, we investigate how self-touch modulates somatosensory evoked potentials (SEPs) evoked by afferent somatosensory input. We show that the P100 SEP component, which has previously been implicated in the conscious perception of a tactile stimulus, is enhanced during self-touch, as compared to when one is touching nothing, an inanimate object, or another person. A follow-up experiment showed that there was no effect of self-touch on SEPs when the body parts in contact were not symmetric. Altogether, our findings suggest the interpretation that the secondary somatosensory cortex might underlie the specific analgesic effect of self-touch.
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