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  • The brain’s resonance to pleasant touch: an EEG investigation of tactile

Singh, Hasimrat, Bauer, Markus, Chowanski, Wojtek, Sui, Yi, Atkinson, Douglas, Baurley, Sharon, Fry, Martin, Evans, Joe and Bianchi-Berthouze, Nadia, 2014, Journal Article, The brain’s resonance to pleasant touch: an EEG investigation of tactile Frontiers in Human Neuroscience, 8 (893). pp. 1-10. ISSN 1662-453X

Abstract or Description:

Somatosensation as a proximal sense can have a strong impact on our attitude toward physical objects and other human beings. However, relatively little is known about how hedonic valence of touch is processed at the cortical level. Here we investigated the electrophysiological correlates of affective tactile sensation during caressing of the right forearm with pleasant and unpleasant textile fabrics. We show dissociation between more physically driven differential brain responses to the different fabrics in early somatosensory cortex – the well-known mu-suppression (10–20 Hz) – and a beta-band response (25–30 Hz) in presumably higher-order somatosensory areas in the right hemisphere that correlated well with the subjective valence of tactile caressing. Importantly, when using single trial classification techniques, beta-power significantly distinguished between pleasant and unpleasant stimulation on a single trial basis with high accuracy. Our results therefore suggest a dissociation of the sensory and affective aspects of touch in the somatosensory system and may provide features that may be used for single trial decoding of affective mental states from simple electroencephalographic measurements.

Official URL: http://journal.frontiersin.org/article/10.3389/fnh...
Subjects: Other > Biological Sciences > C900 Others in Biological Sciences > C910 Applied Biological Sciences
School or Centre: School of Design
Funders: EPSRC
Identification Number or DOI: 10.3389/fnhum.2014.00893
Date Deposited: 23 Dec 2016 23:13
Last Modified: 23 Dec 2016 23:13
URI: http://researchonline.rca.ac.uk/id/eprint/2645

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