Distributed functions of detection and discrimination of vibrotactile stimuli in the hierarchical human somatosensory system

dc.contributor.authorKim, Junsuk
dc.contributor.authorMüller, Klaus-Robert
dc.contributor.authorChung, Yoon Gi
dc.contributor.authorChung, Soon-Cheol
dc.contributor.authorPark, Jang-Yeon
dc.contributor.authorBülthoff, Heinrich H.
dc.contributor.authorKim, Sung-Phil
dc.date.accessioned2019-10-23T13:55:41Z
dc.date.available2019-10-23T13:55:41Z
dc.date.issued2015-01-21
dc.date.updated2019-09-28T00:19:52Z
dc.description.abstractAccording to the hierarchical view of human somatosensory network, somatic sensory information is relayed from the thalamus to primary somatosensory cortex (S1), and then distributed to adjacent cortical regions to perform further perceptual and cognitive functions. Although a number of neuroimaging studies have examined neuronal activity correlated with tactile stimuli, comparatively less attention has been devoted toward understanding how vibrotactile stimulus information is processed in the hierarchical somatosensory cortical network. To explore the hierarchical perspective of tactile information processing, we studied two cases: (a) discrimination between the locations of finger stimulation; and (b) detection of stimulation against no stimulation on individual fingers, using both standard general linear model (GLM) and searchlight multi-voxel pattern analysis (MVPA) techniques. These two cases were studied on the same data set resulting from a passive vibrotactile stimulation experiment. Our results showed that vibrotactile stimulus locations on fingers could be discriminated from measurements of human functional magnetic resonance imaging (fMRI). In particular, it was in case (a) we observed activity in contralateral posterior parietal cortex (PPC) and supramarginal gyrus (SMG) but not in S1, while in case; (b) we found significant cortical activations in S1 but not in PPC and SMG. These discrepant observations suggest the functional specialization with regard to vibrotactile stimulus locations, especially, the hierarchical information processing in the human somatosensory cortical areas. Our findings moreover support the general understanding that S1 is the main sensory receptive area for the sense of touch, and adjacent cortical regions (i.e., PPC and SMG) are in charge of a higher level of processing and may thus contribute most for the successful classification between stimulated finger locations.en
dc.identifier.eissn1662-5161
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/10169
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-9158
dc.language.isoenen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en
dc.subject.ddc610 Medizin und Gesundheitde
dc.subject.otherfMRIen
dc.subject.othervibrotactile stimulationen
dc.subject.othersomatosensory cortexen
dc.subject.otherfunctional specializationen
dc.subject.otherhierarchical tactile processingen
dc.titleDistributed functions of detection and discrimination of vibrotactile stimuli in the hierarchical human somatosensory systemen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.articlenumber1070en
dcterms.bibliographicCitation.doi10.3389/fnhum.2014.01070en
dcterms.bibliographicCitation.journaltitleFrontiers in Human Neuroscienceen
dcterms.bibliographicCitation.originalpublishernameFrontiers Media S.A.en
dcterms.bibliographicCitation.originalpublisherplaceLausanneen
dcterms.bibliographicCitation.volume8en
tub.accessrights.dnbfreeen
tub.affiliationFak. 4 Elektrotechnik und Informatik::Inst. Softwaretechnik und Theoretische Informatik::FG Maschinelles Lernende
tub.affiliation.facultyFak. 4 Elektrotechnik und Informatikde
tub.affiliation.groupFG Maschinelles Lernende
tub.affiliation.instituteInst. Softwaretechnik und Theoretische Informatikde
tub.publisher.universityorinstitutionTechnische Universität Berlinen

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