Motion parallax contribution to perception of self-motion and depth

The two main questions addressed in this study were (a) what effect does yoking the relative expansion and contraction (EC) of retinal images to forward and backward head movements have on the resultant magnitude and stability of perceived depth, and (b) how does this relative EC image motion interact with the depth cues of motion parallax? Relative EC image motion was produced by moving a small CCD camera toward and away from the stimulus, two random-dot surfaces separated in depth, in synchrony with the observers' forward and backward head movements. Observers viewed the stimuli monocularly, on a helmet-mounted display, while moving their heads at various velocities, including zero velocity. The results showed that (a) the magnitude of perceived depth was smaller with smaller head velocities (<10 cm s−1), including the zero-head-velocity condition, than with a larger velocity (10 cm s−1), and (b) perceived depth, when motion parallax and the EC image motion cues were simultaneously presented, is equal to the greater of the two possible perceived depths produced from either of these two cues alone. The results suggested the role of nonvisual information of self-motion on perceiving depth.

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Abstract WP199: Enhancing Perception of Self-motion After Stroke Using Virtual Reality Affects Gait Adaptation in Those With High Levels of Gait Asymmetry

Stroke ◽

10.1161/str.50.suppl_1.wp199 ◽

2019 ◽

Vol 50 (Suppl_1) ◽

Author(s):

Mukul Mukherjee ◽

Takashi Sado ◽

Zachary Motz ◽

Pierre Fayad

Keyword(s):

Virtual Reality ◽

Gait Adaptation ◽

Gait Asymmetry ◽

Perception Of Self ◽

Self Motion

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Orientation of Selective Effects of Body Tilt on Visually Induced Perception of Self-Motion

Perceptual and Motor Skills ◽

10.2466/pms.1998.87.2.667 ◽

1998 ◽

Vol 87 (2) ◽

pp. 667-672 ◽

Cited By ~ 13

Author(s):

Shinji Nakamura ◽

Shinsuke Shimojo

Keyword(s):

Body Posture ◽

Body Tilt ◽

Vestibular Information ◽

Perception Of Self ◽

Self Motion ◽

Selective Effects

We examined the effect of body posture upon visually induced perception of self-motion (vection) with various angles of observer's tilt. The experiment indicated that the tilted body of observer could enhance perceived strength of vertical vection, while there was no effect of body tilt on horizontal vection. This result suggests that there is an interaction between the effects of visual and vestibular information on perception of self-motion.

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Biases in the perception of self-motion during whole-body acceleration and deceleration

Frontiers in Integrative Neuroscience ◽

10.3389/fnint.2013.00090 ◽

2013 ◽

Vol 7 ◽

Cited By ~ 9

Author(s):

Luc Tremblay ◽

Andrew Kennedy ◽

Dany Paleressompoulle ◽

Liliane Borel ◽

Laurence Mouchnino ◽

...

Keyword(s):

Whole Body ◽

Body Acceleration ◽

Acceleration And Deceleration ◽

Perception Of Self ◽

Self Motion

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Influences of the Perception of Self-Motion on Postural Parameters

CyberPsychology & Behavior ◽

10.1089/cpb.2006.9.163 ◽

2006 ◽

Vol 9 (2) ◽

pp. 163-166 ◽

Cited By ~ 8

Author(s):

E.A. Keshner ◽

K. Dokka ◽

R.V. Kenyon

Keyword(s):

Perception Of Self ◽

Self Motion

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Psychophysical evidence for auditory motion parallax

Proceedings of the National Academy of Sciences ◽

10.1073/pnas.1712058115 ◽

2018 ◽

Vol 115 (16) ◽

pp. 4264-4269 ◽

Cited By ~ 11

Author(s):

Daria Genzel ◽

Michael Schutte ◽

W. Owen Brimijoin ◽

Paul R. MacNeilage ◽

Lutz Wiegrebe

Keyword(s):

Motion Parallax ◽

Relative Depth ◽

Auditory Motion ◽

Motion Platform ◽

Sound Sources ◽

Binaural Cues ◽

Binaural Processing ◽

Perceptual Strategy ◽

Observer Motion ◽

Self Motion

Distance is important: From an ecological perspective, knowledge about the distance to either prey or predator is vital. However, the distance of an unknown sound source is particularly difficult to assess, especially in anechoic environments. In vision, changes in perspective resulting from observer motion produce a reliable, consistent, and unambiguous impression of depth known as motion parallax. Here we demonstrate with formal psychophysics that humans can exploit auditory motion parallax, i.e., the change in the dynamic binaural cues elicited by self-motion, to assess the relative depths of two sound sources. Our data show that sensitivity to relative depth is best when subjects move actively; performance deteriorates when subjects are moved by a motion platform or when the sound sources themselves move. This is true even though the dynamic binaural cues elicited by these three types of motion are identical. Our data demonstrate a perceptual strategy to segregate intermittent sound sources in depth and highlight the tight interaction between self-motion and binaural processing that allows assessment of the spatial layout of complex acoustic scenes.

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Multisensory Integration and the Perception of Self-Motion

Oxford Research Encyclopedia of Neuroscience ◽

10.1093/acrefore/9780190264086.013.91 ◽

2018 ◽

Cited By ~ 2

Author(s):

Kathleen E. Cullen

Keyword(s):

Rotational Velocity ◽

Sensory Information ◽

Proprioceptive Information ◽

Everyday Activities ◽

Perceptual Stability ◽

The World ◽

Perception Of Self ◽

Self Motion ◽

The Brain ◽

Vestibular Pathways

As we go about our everyday activities, our brain computes accurate estimates of both our motion relative to the world, and of our orientation relative to gravity. Essential to this computation is the information provided by the vestibular system; it detects the rotational velocity and linear acceleration of our heads relative to space, making a fundamental contribution to our perception of self-motion and spatial orientation. Additionally, in everyday life, our perception of self-motion depends on the integration of both vestibular and nonvestibular cues, including visual and proprioceptive information. Furthermore, the integration of motor-related information is also required for perceptual stability, so that the brain can distinguish whether the experienced sensory inflow was a result of active self-motion through the world or if instead self-motion that was externally generated. To date, understanding how the brain encodes and integrates sensory cues with motor signals for the perception of self-motion during natural behaviors remains a major goal in neuroscience. Recent experiments have (i) provided new insights into the neural code used to represent sensory information in vestibular pathways, (ii) established that vestibular pathways are inherently multimodal at the earliest stages of processing, and (iii) revealed that self-motion information processing is adjusted to meet the needs of specific tasks. Our current level of understanding of how the brain integrates sensory information and motor-related signals to encode self-motion and ensure perceptual stability during everyday activities is reviewed.

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