Perceived timing of vestibular stimulation relative to touch, light and sound

@article{BarnettCowan2009PerceivedTO,
  title={Perceived timing of vestibular stimulation relative to touch, light and sound},
  author={Michael Barnett-Cowan and Laurence R. Harris},
  journal={Experimental Brain Research},
  year={2009},
  volume={198},
  pages={221-231}
}
Different senses have different processing times. Here we measured the perceived timing of galvanic vestibular stimulation (GVS) relative to tactile, visual and auditory stimuli. Simple reaction times for perceived head movement (438 ± 49 ms) were significantly longer than to touches (245 ± 14 ms), lights (220 ± 13 ms), or sounds (197 ± 13 ms). Temporal order and simultaneity judgments both indicated that GVS had to occur about 160 ms before other stimuli to be perceived as simultaneous with… 
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The persistent lead time required for vestibular stimulation provides further evidence that the perceptual latency of vestibul stimulation is greater than the other senses.
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The unexpected additional delay in processing the timing of an active head movement is compatible with the suppression hypothesis and is discussed in relation to suppression of vestibular signals during self-generated head movement.
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The amount of bias varied between subjects the effect of delay was similar, and the mean bias was much diminished with temporal misalignments of ±500 ms, and there was no longer any visual influence on the inertial heading when the visual stimulus was delayed by 1,000 ms or more.
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  • 2012
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It is demonstrated that perception of vestibular stimuli depends on prior motion, which has important implications for understanding and quantifying Vestibular perception.
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The wide-ranging influences of the vestibular system and self-motion perception upon behavior, namely eye movement, postural control, and spatial awareness are demonstrated as well as new discoveries that such perception can impact upon numerical cognition, human affect, and bodily self-consciousness are demonstrated.
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