Lateral Skin Stretch Influences Direction Judgments of Motion Across the Skin

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• 关键词：Tactile ; Motion ; Skin stretch ; Friction ; Psychophysics ; Haptics
• 刊名：Lecture Notes in Computer Science
• 出版年：2014
• 出版时间：2014
• 年：2014
• 卷：1
• 期：1
• 页码：425-431
• 全文大小：1,635 KB
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• 作者单位：Tatjana Seizova-Cajic (17)
  Kornelia Karlsson (18)
  Sara Bergstrom (18)
  Sarah McIntyre (17)
  Ingvars Birznieks (19) (20)
  
  17. Faculty of Health Sciences, University of Sydney, Sydney, Australia
  18. Linkoping University, Linkoping, Sweden
  19. School of Medical Sciences, University of New South Wales, Sydney, Australia
  20. School of Science and Health, University of Western Sydney, Sydney, Australia
  
• ISSN：1611-3349

文摘

Background: Sliding of surfaces across the skin changes the position of edges and texture elements relative to the receptive fields of somatosensory neurons. This ‘successive positions-cue is sufficient to elicit motion sensation. Surfaces also create lateral skin stretch due to friction and we ask whether this potential cue influences perceived direction. Method: A 4-pin array was applied to the forearm to manipulate the two motion cues independently. It indicated distal or proximal direction by pin activation in the order 1-2-3-4 or 4-3-2-1. Crucially, each pin also stretched the skin by moving 3.5?mm laterally in the same (Congruent cues) or opposite direction (Incongruent cues). Results: 90?% of motion direction judgments accurately reflected succession of positions with a Congruent skin stretch cue but only 79?% with an Incongruent skin stretch cue (F1,7?=?6.80, p?=?.035). Conclusion: The skin stretch cue contributes to neural coding of motion direction.