Frequency-specifc tendon vibration (TV) elicits illusory kinesthetic sensations around the vibrated body parts. Studies indicate that vision plays a fundamental role in modulating such illusions. In our current study, we used immersive virtual reality (IVR) to investigate the role of body-related visual feedback in modulating illusory sensation of movement in the left arm. Thirty healthy participants were asked to evaluate the onset of motor illusion and four illusion-related features (vividness, duration, extension and afterefect), in the presence and absence of real and virtual visual feedback. Additionally, subjective reports of the embodiment illusion (the sense of embodying a virtual surrogate) were collected in virtual conditions. Results showed a progressive decrease in the perception of the motor illusion along a continuum ranging from the absence of visual feedback (maximal illusory perception) to the observation of one’s own real arm (minimal illusory perception). Interestingly, the appearance of the virtual limbs afected the movement illusion diferently. Specifcally, TV evoked a stronger kinesthetic illusion when observing the virtual hand detached from the limb than during the observation of the virtual full limb and virtual object. This suggests that a closer visual resemblance between the virtual and real limb results in a greater efect on proprioceptive processing. However, no signifcant correlation was found between the illusion of arm movement and the illusion of embodiment, indicating that the two phenomena may not be directly related. These fndings provide new insight into the role of body-related visual feedback in modulating motor illusions.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Visual feedback from a virtual body modulates motor illusion induced by tendon vibration



    Erscheinungsdatum :

    01.01.2021



    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Klassifikation :

    DDC:    629



    Towards a digital body: the virtual arm illusion

    Slater, Mel / Perez-Marcos, Daniel / Ehrsson, H. Henrik et al. | BASE | 2008

    Freier Zugriff

    Virtual Hand Illusion Induced by Visuomotor Correlations

    Sanchez-Vives, MV / Spanlang, B / Frisoli, A et al. | BASE | 2010

    Freier Zugriff

    Virtual Hand Illusion Induced by Visuomotor Correlations.

    M. V. Sanchez / B. Spanlang / M. Slater et al. | BASE | 2010

    Freier Zugriff

    Susceptibility to Flight-Simulator Induced Runway Width Visual Illusion

    Socha, Vladimir / Socha, Lubos / Hanakova, Lenka et al. | IEEE | 2024


    Extending body space in immersive virtual reality: a very long arm illusion.

    Kilteni, K / Normand, JM / Sanchez-Vives, MV et al. | BASE | 2012

    Freier Zugriff