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dc.contributor.authorHarvie, Daniel S
dc.contributor.authorMeulders, Ann
dc.contributor.authorReid, Emily
dc.contributor.authorCamfferman, Danny
dc.contributor.authorBrinkworth, Russell SA
dc.contributor.authorMoseley, G Lorimer
dc.date.accessioned2018-10-31T04:55:36Z
dc.date.available2018-10-31T04:55:36Z
dc.date.issued2016
dc.identifier.issn0048-5772
dc.identifier.doi10.1111/psyp.12631
dc.identifier.urihttp://hdl.handle.net/10072/142565
dc.description.abstractLearning to initiate defenses in response to specific signals of danger is adaptive. Some chronic pain conditions, however, are characterized by widespread anxiety, avoidance, and pain consistent with a loss of defensive response specificity. Response specificity depends on ability to discriminate between safe and threatening stimuli; therefore, specificity might depend on sensory precision. This would help explain the high prevalence of chronic pain in body areas of low tactile acuity, such as the lower back, and clarify why improving sensory precision may reduce chronic pain. We compared the acquisition and generalization of fear of pain‐associated vibrotactile stimuli delivered to either the hand (high tactile acuity) or the back (low tactile acuity). During acquisition, tactile stimulation at one location (CS+) predicted the noxious electrocutaneous stimulation (US), while tactile stimulation at another location (CS−) did not. Responses to three stimuli with decreasing spatial proximity to the CS+ (generalizing stimuli; GS1–3) were tested. Differential learning and generalization were compared between groups. The main outcome of fear‐potentiated startle responses showed differential learning only in the hand group. Self‐reported fear and expectancy confirmed differential learning and limited generalization in the hand group, and suggested undifferentiated fear and expectancy in the back group. Differences in generalization could not be inferred from the startle data. Specificity of fear responses appears to be affected by somatosensory precision. This has implications for our understanding of the role of sensory imprecision in the development of chronic pain.
dc.description.peerreviewedYes
dc.languageEnglish
dc.publisherWiley-Blackwell
dc.relation.ispartofpagefrom921
dc.relation.ispartofpageto929
dc.relation.ispartofissue6
dc.relation.ispartofjournalPsychophysiology
dc.relation.ispartofvolume53
dc.subject.fieldofresearchNeurosciences not elsewhere classified
dc.subject.fieldofresearchBiological Sciences
dc.subject.fieldofresearchMedical and Health Sciences
dc.subject.fieldofresearchPsychology and Cognitive Sciences
dc.subject.fieldofresearchcode110999
dc.subject.fieldofresearchcode06
dc.subject.fieldofresearchcode11
dc.subject.fieldofresearchcode17
dc.titleSelectivity of conditioned fear of touch is modulated by somatosensory precision
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Health, School of Allied Health Sciences
gro.hasfulltextNo Full Text
gro.griffith.authorHarvie, Daniel S.


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