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Experimental Brain Research

, Volume 206, Issue 4, pp 419–426 | Cite as

Electrotactile stimuli delivered across fingertips inducing the Cutaneous Rabbit Effect

  • Jay P. Warren
  • Marco Santello
  • Stephen I. Helms Tillery
Research Article

Abstract

Previous studies have been unable to induce the Cutaneous Rabbit Effect (CRE) when the most likely perceived location of the illusory stimulus is on a non-continuous skin area. To determine whether the CRE could be elicited when each of the delivered stimuli were on non-continuous skin areas, we developed a new electrotactile stimulation paradigm attempting to induce the CRE across the fingertips. Though our stimulation paradigm differed from classic reduced CRE paradigms through the use of electrotactile stimuli, focusing the subject attention to a ‘likely’ illusory site, and the inclusion of a fourth stimulation site (two stimuli after the illusory stimulus), these factors were not the cause of the illusory effect we observed. Experiments conducted on the forearm validated that our paradigm elicited similar results to those reported in previous CRE studies that used either 3-stimulation-point mechanical or electrotactile stimuli with subject attention focused on the ‘likely’ illusory site. Across the fingertips, we observed an increase in stimulus mislocalization onto the middle fingertip, the ‘likely’ perceived location of the illusory stimuli, under Illusory Rabbit Trains compared to the Motion Bias Trains. Because the Motion Bias Trains should not induce a perceived location shift of the illusory stimulus but stimulates the adjacent digits in a similar way to the Illusory Rabbit Trains, differences observed between their mislocalization rates between these trains indicate that the CRE can be induced across the fingertips. These results provide the first evidence that the CRE can ‘jump’ when the stimuli occur across non-continuous skin areas.

Keywords

Cutaneous Rabbit Effect Electrotactile Electrocutaneous Tactile illusion Fingertips 

Notes

Acknowledgments

The authors would like to thank the members of the SensoriMotor Research Group and the Neural Control of Movement Laboratory at Arizona State University for their aid in designing the experimental protocol. This research was funded by the National Institute of Health, R01 NS050256.

References

  1. Blankenburg F, Ruben J, Meyer R, Schwiemann J, Villringer A (2003) Evidence for a rostral-to-caudal somatotopic organization in human primary somatosensory cortex with mirror-reversal in areas 3b and 1. Cereb Cortex 13:987–993CrossRefPubMedGoogle Scholar
  2. Blankenburg F, Ruff CC, Deichmann R, Rees G, Driver J (2006) The cutaneous rabbit illusion affects human primary sensory cortex somatotopically. Plos Biology 4:459–466CrossRefGoogle Scholar
  3. Chen LM, Friedman RM, Roe AW (2003) Optical imaging of a tactile illusion in area 3b of the primary somatosensory cortex. Science 302:881–885CrossRefPubMedGoogle Scholar
  4. Cholewiak RW (1976) Satiation in cutaneous saltation. Sens Process 1:163–175Google Scholar
  5. Cholewiak RW (1999) The perception of tactile distance: influences of body site, space, and time. Perception 28:851–875CrossRefPubMedGoogle Scholar
  6. Eimer M, Forster B, Vibell J (2005) Cutaneous saltation within and across arms: a new measure of the saltation illusion in somatosensation. Percept Psychophys 67:458–468PubMedGoogle Scholar
  7. Flach R, Haggard P (2006) The cutaneous rabbit revisited. J Exp Psychol Hum Percept Perform 32:717–732CrossRefPubMedGoogle Scholar
  8. Geldard FA (1977) Cutaneous stimuli, vibratory and saltatory. J Invest Dermatol 69:83–87CrossRefPubMedGoogle Scholar
  9. Geldard FA (1980) Cutaneous saltatory areas and intensity. Bull Psychon Soc 16:178Google Scholar
  10. Geldard FA (1981) Saltatory areas of the skin—what determines their limits. Bull Psychon Soc 18:55Google Scholar
  11. Geldard FA (1982a) Intersensory perception and sensory integration—walk, Rd, Pick, Hl. Am J Psychol 95:529–530CrossRefGoogle Scholar
  12. Geldard FA (1982b) Saltation in somesthesis. Psychol Bull 92:136–175CrossRefPubMedGoogle Scholar
  13. Geldard FA, Sherrick CE (1972) Cutaneous rabbit—perceptual illusion. Science 178:178CrossRefPubMedGoogle Scholar
  14. Geldard FA, Sherrick CE (1983) The cutaneous saltatory area and its presumed neural basis. Percept Psychophys 33:299–304PubMedGoogle Scholar
  15. Goldreich D (2007) A bayesian perceptual model replicates the cutaneous rabbit and other spatiotemporal illusions. In: PLos One, p e333Google Scholar
  16. Kilgard MP, Merzenich MM (1995) Anticipated stimuli across skin. Nature 373:663CrossRefPubMedGoogle Scholar
  17. Miyazaki M, Hirashima M, Nozaki D (2010) The “Cutaneous Rabbit” hopping out of the body. J Neurosci 30:1856–1860CrossRefPubMedGoogle Scholar
  18. Montgomery DC (2009) Design and analysis of experiments. Wiley, HobokenGoogle Scholar
  19. Naito E, Roland PE, Whrsson HH (2002) I feel my hand moving: a new role of the primary motor cortex in somatic perception of limb movement. Neuron 35:979–988CrossRefGoogle Scholar
  20. Schweizer R, Maier M, Braun C, Birbaumer N (2000) Distribution of mislocalizations of tactile stimuli on the fingers of the human hand. Somatosens Mot Res 17:309–316CrossRefPubMedGoogle Scholar
  21. Schweizer R, Braun C, Fromm C, Wilms A, Birbaumer N (2001) The distribution of mislocalizations across fingers demonstrates training-induced neuroplastic changes in somatosensory cortex. Exp Brain Res 139:435–442CrossRefPubMedGoogle Scholar
  22. Schweizer R, Voit D, Frahm J (2008) Finger representations in human primary somatosensory cortex as revealed by high-resolution functional MRI of tactile stimulation. Neuroimage 42:28–35CrossRefPubMedGoogle Scholar
  23. Warren JP, Bobich LR, Santello M, Sweeney JD, Helms Tillery SI (2008) Receptive field characteristics under electrotactile stimulation of the fingertip. Ieee Trans Neural Syst Rehabil Eng 16:410–415CrossRefPubMedGoogle Scholar
  24. Warren JP, Santello M, Helms Tillery SI (2009) Electrotactile inducement of the Cutaneous Rabbit Effect (CRE) across human fingertips. University of California System-wide Bioengineering Symposium, MercedGoogle Scholar
  25. Weinstein S (1968) Intensive and extensive aspects of tactile sensitivity as a function of body part, sex and laterality. In: Kenshalo DR (ed) The skin senses. Charles L. Thomas, Springfield, pp 195–222Google Scholar

Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Jay P. Warren
    • 1
  • Marco Santello
    • 1
  • Stephen I. Helms Tillery
    • 1
    • 2
  1. 1.School of Biological and Health System EngineeringArizona State UniversityTempeUSA
  2. 2.Psychology DepartmentArizona State UniversityTempeUSA

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