Is perception of self-motion speed a necessary condition for intercepting a moving target while walking?

2014 ◽  
Vol 566 ◽  
pp. 315-319
Author(s):  
Antoine H.P. Morice ◽  
Grégory Wallet ◽  
Gilles Montagne
Keyword(s):  
Necessary Condition ◽  
Moving Target ◽  
Motion Speed ◽  
Perception Of Self ◽  
Self Motion

Perception of Self-Motion and Regulation of Walking Speed in Young-Old Adults

Motor Control ◽  
2015 ◽  
Vol 19 (3) ◽  
pp. 191-206 ◽  
Author(s):  
Marie-Jasmine Lalonde-Parsi ◽  
Anouk Lamontagne
Keyword(s):  
Visual Motion ◽  
Walking Speed ◽  
Perceptual Task ◽  
Old Adults ◽  
Motion Speed ◽  
Perception Of Self ◽  
Speed Discrimination ◽  
Self Motion ◽  
The Relationship ◽  
Young Old

Whether a reduced perception of self-motion contributes to poor walking speed adaptations in older adults is unknown. In this study, speed discrimination thresholds (perceptual task) and walking speed adaptations (walking task) were compared between young (19–27 years) and young-old individuals (63–74 years), and the relationship between the performance on the two tasks was examined. Participants were evaluated while viewing a virtual corridor in a helmet-mounted display. Speed discrimination thresholds were determined using a staircase procedure. Walking speed modulation was assessed on a self-paced treadmill while exposed to different self-motion speeds ranging from 0.25 to 2 times the participants’ comfortable speed. For each speed, participants were instructed to match the self-motion speed described by the moving corridor. On the walking task, participants displayed smaller walking speed errors at comfortable walking speeds compared with slower of faster speeds. The young-old adults presented larger speed discrimination thresholds (perceptual experiment) and larger walking speed errors (walking experiment) compared with young adults. Larger walking speed errors were associated with higher discrimination thresholds. The enhanced performance on the walking task at comfortable speed suggests that intersensory calibration processes are influenced by experience, hence optimized for frequently encountered conditions. The altered performance of the young-old adults on the perceptual and walking tasks, as well as the relationship observed between the two tasks, suggest that a poor perception of visual motion information may contribute to the poor walking speed adaptations that arise with aging.

Torsional eye movements are facilitated during perception of self-motion

1999 ◽  
Vol 126 (4) ◽  
pp. 495-500 ◽  
Author(s):  
K. V. Thilo ◽  
Thomas Probst ◽  
Adolfo M. Bronstein ◽  
Yatsuji Ito ◽  
Michael A. Gresty
Keyword(s):  
Eye Movements ◽  
Perception Of Self ◽  
Self Motion

Plato on Self-Motion in Laws X

Rhizomata ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 96-122
Author(s):  
Rareș Ilie Marinescu
Keyword(s):  
Circular Motion ◽  
Necessary Condition ◽  
Spatial Motion ◽  
Textual Evidence ◽  
Spatial Understanding ◽  
Self Motion

Abstract In this paper, I argue that Plato conceives self-motion as non-spatial in Laws X. I demonstrate this by focusing on the textual evidence and by refuting interpretations according to which self-motion either is a specific type of spatial motion (e. g. circular motion) or is said to require space as a necessary condition for its occurrence. Moreover, I show that this non-spatial understanding differs from the identification of the soul’s motion with locomotion in the Timaeus. Consequently, I provide an explanation for this difference between the Timaeus and Laws X by considering developmentalist and contextualist viewpoints.

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

1998 ◽  
Vol 87 (2) ◽  
pp. 667-672 ◽  
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.

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

2013 ◽  
Vol 7 ◽  
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

scholarly journals Influences of the Perception of Self-Motion on Postural Parameters

2006 ◽  
Vol 9 (2) ◽  
pp. 163-166 ◽  
Author(s):  
E.A. Keshner ◽  
K. Dokka ◽  
R.V. Kenyon
Keyword(s):  
Perception Of Self ◽  
Self Motion

Multisensory Integration and the Perception of Self-Motion

2018 ◽  
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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