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Touch targeting C-tactile afferent fibers has a unique physiological pattern: A combined electrodermal and facial electromyography study
Univ Oslo, Norway.
Linköping University, Department of Clinical and Experimental Medicine, Center for Social and Affective Neuroscience. Linköping University, Faculty of Medicine and Health Sciences.ORCID iD: 0000-0002-0645-4869
Univ Oslo, Norway; Oslo Univ Hosp, Norway.
Univ Oslo, Norway.
2019 (English)In: Biological Psychology, ISSN 0301-0511, E-ISSN 1873-6246, Vol. 140, p. 55-63Article in journal (Refereed) Published
Abstract [en]

Caress-like touch is thought to rely on C-tactile (CT) fiber signaling. Here, the arousing and emotional effects of CT-optimal touch were assessed via participants skin conductance level (SCL), facial electromyography (EMG) responses and subjective ratings of pleasantness and intensity. Temporal facial EMG analysis was based on the conduction velocity of CT-fibers. 45 healthy participants received CT-optimal touch, control touch and visual control input during 2-minute trials. CT optimal touch was significantly more pleasant and intense than control touch. In the initial 700 ms of stimulation there was no difference in facial EMG responses to touch. Between 700 and 6300 ms there was a significant reduction of corrugator activity in response to CT optimal touch only, possibly reflecting the affective value of CT optimal touch. Based on the temporal dynamics of the reduced corrugator activity, we suggest that CT fibers are involved in mediating a reduction in corrugator activity.

Place, publisher, year, edition, pages
ELSEVIER SCIENCE BV , 2019. Vol. 140, p. 55-63
Keywords [en]
C fibers; C-tactile fibers; Affective touch; Social touch; Pleasantness; Intensity; Facial EMG; Corrugator; Zygomaticus
National Category
Physiology
Identifiers
URN: urn:nbn:se:liu:diva-153967DOI: 10.1016/j.biopsycho.2018.11.006ISI: 000454710800007PubMedID: 30468895OAI: oai:DiVA.org:liu-153967DiVA, id: diva2:1281546
Available from: 2019-01-22 Created: 2019-01-22 Last updated: 2019-03-05

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CiteExportLink to record
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Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
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