Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/74742
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dc.contributorDepartment of Rehabilitation Sciences-
dc.creatorPeng, J-
dc.creatorChan, SCC-
dc.creatorChau, BKH-
dc.creatorYu, Q-
dc.creatorChan, CCH-
dc.date.accessioned2018-03-29T09:33:45Z-
dc.date.available2018-03-29T09:33:45Z-
dc.identifier.urihttp://hdl.handle.net/10397/74742-
dc.language.isoenen_US
dc.publisherFrontiers Media S. Aen_US
dc.rightsCopyright © 2017 Peng, Chan, Chau, Yu and Chan. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY) (https://creativecommons.org/licenses/by/4.0/). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.en_US
dc.rightsThe following publication Peng J, Chan SCC, Chau BKH, Yu Q and Chan CCH (2017) Salience of Somatosensory Stimulus Modulating External-to-Internal Orienting Attention. Front. Hum. Neurosci. 11:428,1-10 is available at https://dx.doi.org/10.3389/fnhum.2017.00428en_US
dc.subjectAttentionen_US
dc.subjectExternal attentionen_US
dc.subjectInternal attentionen_US
dc.subjectOrientingen_US
dc.subjectSalience of stimulusen_US
dc.subjectSomatosensory stimulusen_US
dc.titleSalience of somatosensory stimulus modulating external-to-internal orienting attentionen_US
dc.typeJournal/Magazine Articleen_US
dc.identifier.spage1en_US
dc.identifier.epage10en_US
dc.identifier.volume11en_US
dc.identifier.doi10.3389/fnhum.2017.00428en_US
dcterms.abstractShifting between one’s external and internal environments involves orienting attention. Studies on differentiating subprocesses associated with external-to-internal orienting attention are limited. This study aimed to reveal the characteristics of the disengagement, shifting and reengagement subprocesses by using somatosensory external stimuli and internally generated images. Study participants were to perceive nociceptive external stimuli (External Low (EL) or External High (EH)) induced by electrical stimulations (50 ms) followed by mentally rehearsing learned subnociceptive images (Internal Low (IL) and Internal High (IH)). Behavioral responses and EEG signals of the participants were recorded. The three significant components elicited were: frontocentral negativity (FCN; 128–180 ms), fronto-central P2 (200–260 ms), and central P3 (320–380 ms), which reflected the three subprocesses, respectively. Differences in the FCN and P2 amplitudes during the orienting to the subnociceptive images revealed only in the EH but not EL stimulus condition that are new findings. The results indicated that modulations of the disengagement and shifting processes only happened if the external nociceptive stimuli were of high salience and the external-to-internal incongruence was large. The reengaging process reflected from the amplitude of P3 correlated significantly with attenuation of the pain intensity felt from the external nociceptive stimuli. These findings suggested that the subprocesses underlying external-to-internal orienting attention serve different roles. Disengagement subprocess tends to be stimulus dependent, which is bottom-up in nature. Shifting and reengagement tend to be top-down subprocesses, which taps on cognitive control. This subprocess may account for the attenuation effects on perceived pain intensity after orienting attention.-
dcterms.accessRightsopen accessen_US
dcterms.bibliographicCitationFrontiers in human neuroscience, 24 Aug. 2017, v. 11, 428, p. 1-10-
dcterms.isPartOfFrontiers in human neuroscience-
dcterms.issued2017-08-24-
dc.identifier.scopus2-s2.0-85031999254-
dc.identifier.eissn1662-5161en_US
dc.identifier.artn428en_US
dc.identifier.rosgroupid2017000329-
dc.description.ros2017-2018 > Academic research: refereed > Publication in refereed journalen_US
dc.description.validate201803 bcmaen_US
dc.description.oaVersion of Recorden_US
dc.identifier.FolderNumbera0803-n05en_US
dc.identifier.SubFormID2043en_US
dc.description.fundingSourceRGCen_US
dc.description.fundingTextPolyU 5600/12Men_US
dc.description.pubStatusPublisheden_US
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