Evidence for sparse C-tactile afferent innervation of glabrous human hand skin

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  • Roger Holmes Watkins
    LNC (Laboratoire de Neurosciences Cognitives (UMR 7291), Centre National de la Recherche Scientifique (CNRS), Aix-Marseille Université, Marseille, France
  • Mariama Dione
    LNC (Laboratoire de Neurosciences Cognitives (UMR 7291), Centre National de la Recherche Scientifique (CNRS), Aix-Marseille Université, Marseille, France
  • Rochelle Ackerley
    LNC (Laboratoire de Neurosciences Cognitives (UMR 7291), Centre National de la Recherche Scientifique (CNRS), Aix-Marseille Université, Marseille, France
  • Helena Backlund Wasling
    Department of Physiology, University of Gothenburg, Gothenburg, Sweden
  • Johan Wessberg
    Department of Physiology, University of Gothenburg, Gothenburg, Sweden
  • Line S. Löken
    Department of Physiology, University of Gothenburg, Gothenburg, Sweden

Abstract

<jats:p> Human touch is encoded by low-threshold mechanoreceptors, including myelinated Aβ afferents and unmyelinated C-tactile (CT) afferents. CTs are abundant in hairy skin and are thought to code gentle, stroking touch that signals positive affective interactions. CTs have never been described in human glabrous skin, yet we show evidence of their existence on the hand, albeit at a relatively low density. Glabrous skin CTs may provide modulatory reinforcement of gentle tactile interactions during touch using the hands. </jats:p>

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