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Proprioceptive influences on auditory and visual spatial localization.

J R Lackner, B Shenker

    The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
    |March 1, 1985
    PubMed
    Summary
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    Proprioception, or the sense of arm position, influences where we perceive sounds and sights. Manipulating arm position sense alters auditory and visual target localization, demonstrating its impact on sensory perception.

    Area of Science:

    • Neuroscience
    • Sensory Perception
    • Proprioception

    Background:

    • Proprioceptive information about limb position is crucial for spatial awareness.
    • The influence of proprioception on the localization of external sensory targets is not fully understood.

    Purpose of the Study:

    • To investigate how proprioceptive feedback regarding arm position affects the perceived location of auditory and visual targets attached to the hand.
    • To determine if proprioceptive information biases the central representation of gaze and auditory localization.

    Main Methods:

    • Mechanical vibration of the biceps brachii muscle was used to distort the perceived position of a restrained arm.
    • Participants reported changes in the apparent direction of auditory and visual targets fixed to their hand.

    Related Experiment Videos

  • Eye movements were monitored while subjects fixated on a visual target during perceived arm motion.

    • Main Results:

    • Vibration induced a compelling sense of arm extension, altering the perceived location of attached auditory and visual targets.
    • Changes in target localization were consistent with the direction and plane of the apparent arm motion.
    • Auditory localization was biased, indicating that proprioceptive input can override or modify auditory cues for spatial perception.

    Conclusions:

    • Proprioceptive information significantly influences the central nervous system's representation of limb position.
    • This proprioceptive influence extends to the localization of auditory and visual stimuli, affecting multisensory integration.
    • The study highlights how the brain integrates proprioceptive data with other sensory inputs to construct spatial awareness, even leading to disparate auditory perceptions from identical binaural cues.