1. Dynamic arm movements attenuate the perceptual distortion of visual vertical induced during prolonged whole-body tilt
- Author
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Keisuke Tani, Yasushi Kodaka, Keisuke Kushiro, and Shinji Yamamoto
- Subjects
Male ,Central Nervous System ,Vision ,Physiology ,Sensory Physiology ,Social Sciences ,Statics ,Somatosensory system ,Nervous System ,Medicine and Health Sciences ,Psychology ,Perceptual Distortion ,Mathematics::Representation Theory ,media_common ,Multidisciplinary ,Physics ,Classical Mechanics ,Sensory Systems ,Arms ,Tilt (optics) ,Somatosensory System ,Head Movements ,Shutters ,Physical Sciences ,Arm ,Visual Perception ,Medicine ,Engineering and Technology ,Female ,Sensory Perception ,Anatomy ,Whole body ,Gravitation ,Research Article ,Adult ,medicine.medical_specialty ,Science ,media_common.quotation_subject ,Movement ,Posture ,Young Adult ,Physical medicine and rehabilitation ,Perception ,Orientation ,medicine ,Humans ,Mechanical Engineering ,Cognitive Psychology ,Biology and Life Sciences ,Space Perception ,Body Limbs ,Cognitive Science ,Neuroscience - Abstract
Concurrent body movements have been shown to enhance the accuracy of spatial judgment, but it remains unclear whether they also contribute to perceptual estimates of gravitational space not involving body movements. To address this, we evaluated the effects of static or dynamic arm movements during prolonged whole-body tilt on the subsequent perceptual estimates of visual or postural vertical. In Experiment 1, participants were asked to continuously perform static or dynamic arm movements during prolonged tilt, and we assessed their effects on the prolonged tilt-induced shifts of subjective visual vertical (SVV) at a tilted position (during-tiltsession) or near upright (post-tiltsession). In Experiment 2, we evaluated how static or dynamic arm movements during prolonged tilt subsequently affected the subjective postural vertical (SPV). In Experiment 1, we observed that the SVV was significantly shifted toward the direction of prolonged tilt in both sessions. The SVV shifts decreased when performing dynamic arm movements in theduring-tiltsession, but not in thepost-tiltsession. In Experiment 2, as well as SVV, the SPV was shifted toward the direction of prolonged tilt, but it was not significantly attenuated by the performance of static or dynamic arm movements. The results of theduring-tiltsession suggest that the central nervous system utilizes additional information generated by dynamic body movements for perceptual estimates of visual vertical.
- Published
- 2020