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The cutaneous "rabbit": a perceptual illusion.

F A Geldard, C E Sherrick

    Science (New York, N.Y.)
    |October 13, 1972
    PubMed
    Summary
    This summary is machine-generated.

    Stimulating widely separated skin points creates phantom sensations connecting them. This study explores the unusual localization of these tactile and electrical pulses, with some conditions specified.

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    Area of Science:

    • Neuroscience
    • Somatosensory research
    • Perceptual psychology

    Background:

    • Cutaneous stimulation can evoke complex sensory experiences.
    • The precise mechanisms behind tactile localization are not fully elucidated.
    • Previous research has not fully explored anomalous localization phenomena.

    Purpose of the Study:

    • To investigate the phenomenon of anomalous localization of cutaneous pulses.
    • To characterize the "phantom" impressions generated by successive stimulation.
    • To explore boundary conditions of this perceptual effect.

    Main Methods:

    • Applying trains of taps to widely separated points on the body.
    • Recording and analyzing the reported locations of mechanical and electrical pulses.

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  • Systematically varying stimulation parameters to identify boundary conditions.

    • Main Results:

    • Anomalous localizations of mechanical and electrical pulses were consistently produced.
    • A manifold of discrete "phantom" impressions were reported by observers, connecting stimulated points.
    • Specific boundary conditions influencing the phenomenon were identified.

    Conclusions:

    • The study demonstrates a peculiar perceptual phenomenon involving anomalous localization of tactile stimuli.
    • The theoretical basis for these "phantom" sensations requires further investigation.
    • The identified boundary conditions provide a foundation for future research into somatosensory perception.