Perception of Self-Motion From Peripheral Optokinetic Stimulation Suppresses Visual Evoked Responses to Central Stimuli

2003 ◽  
Vol 90 (2) ◽  
pp. 723-730 ◽  
Author(s):  
Kai V. Thilo ◽  
Andreas Kleinschmidt ◽  
Michael A. Gresty
Keyword(s):  
Optical Flow ◽  
Functional Neuroimaging ◽  
Stimulus Change ◽  
Object Motion ◽  
Large Field ◽  
Peripheral Stimulus ◽  
Optokinetic Stimulation ◽  
Central Visual Field ◽  
Self Motion ◽  
Visual Evoked

In a previous functional neuroimaging study we found that early visual areas deactivated when a rotating optical flow stimulus elicited the illusion of self-motion (vection) compared with when it was perceived as a moving object. Here, we investigated whether electrical cortical responses to an independent central visual probe stimulus change as a function of whether optical flow stimulation in the periphery induces the illusion of self-motion or not. Visual-evoked potentials (VEPs) were obtained in response to pattern-reversals in the central visual field in the presence of a constant peripheral large-field optokinetic stimulus that rotated around the naso-occipital axis and induced intermittent sensations of vection. As control, VEPs were also recorded during a stationary peripheral stimulus and showed no difference than those obtained during optokinetic stimulation. The VEPs during constant peripheral stimulation were then divided into two groups according to the time spans where the subjects reported object- or self-motion, respectively. The N70 VEP component showed a significant amplitude reduction when, due to the peripheral stimulus, subjects experienced self-motion compared to when the peripheral stimulus was perceived as object-motion. This finding supplements and corroborates our recent evidence from functional neuroimaging that early visual cortex deactivates when a visual flow stimulus elicits the illusion of self-motion compared with when the same sensory input is interpreted as object-motion. This dampened responsiveness might reflect a redistribution of sensorial and attentional resources when the monitoring of self-motion relies on a sustained and veridical processing of optic flow and may be compromised by other sources of visual input.

Linear Vection in the Central Visual Field Facilitated by Kinetic Depth Cues

Perception ◽  
1992 ◽  
Vol 21 (3) ◽  
pp. 337-349 ◽  
Author(s):  
Laura Telford ◽  
Jonathan Spratley ◽  
Barrie J Frost
Keyword(s):  
Visual Field ◽  
Object Motion ◽  
Apparent Depth ◽  
Onset Latency ◽  
Central Visual Field ◽  
Central Display ◽  
Linear Vection ◽  
Kinetic Depth ◽  
Self Motion ◽  
Stimulation Of

Illusory self-motion (vection) is thought to be determined by motion in the peripheral visual field, whereas stimulation of more central retinal areas results in object-motion perception. Recent data suggest that vection can be produced by stimulation of the central visual field provided it is configured as a more distant surface. In this study vection strength (tracking speed, onset latency, and the percentage of trials where vection was experienced) and the direction of self-motion produced by displays moving in the central visual field were investigated. Apparent depth, introduced by using kinetic occlusion information, influenced vection strength. Central displays perceived to be in the background elicited stronger vection than identical displays appearing in the foreground. Further, increasing the eccentricity of these displays from the central retina diminished vection strength. If the central and peripheral displays were moved in opposite directions, vection strength was unaffected, and the direction of vection was determined by motion of the central display on almost half of the trials when the centre was far. Near centres produced fewer centre-consistent responses. A complete understanding of linear vection requires that factors such as display size, retinal locus, and apparent depth plane are considered.

scholarly journals Does perceptual-motor recalibration of locomotion depend on perceived self motion or the magnitude of optical flow?

2010 ◽  
Vol 5 (8) ◽  
pp. 386-386
Author(s):  
W. B. Thompson ◽  
B. J. Mohler ◽  
S. H. Creem-Regehr
Keyword(s):  
Optical Flow ◽  
Self Motion

scholarly journals An integrated neural model of robust self-motion and object motion perception in visually realistic environments

2019 ◽  
Vol 19 (10) ◽  
pp. 294a
Author(s):  
Scott T Steinmetz ◽  
Oliver W Layton ◽  
N. Andrew Browning ◽  
Nathaniel V Powell ◽  
Brett R Fajen
Keyword(s):  
Motion Perception ◽  
Neural Model ◽  
Object Motion ◽  
Self Motion

Hopfield neural network for qualitative recognition of object motion based on optical flow

1994 ◽  
Author(s):  
Gabriella Convertino ◽  
Maddalena Brattoli ◽  
Arcangelo Distante
Keyword(s):  
Neural Network ◽  
Optical Flow ◽  
Hopfield Neural Network ◽  
Object Motion

Does visually induced self-motion affect grip force when holding an object?

2012 ◽  
Vol 108 (6) ◽  
pp. 1685-1694 ◽  
Author(s):  
Lionel Bringoux ◽  
Jean-Claude Lepecq ◽  
Frédéric Danion
Keyword(s):  
Grip Force ◽  
Movement Control ◽  
Arm Movement ◽  
Object Motion ◽  
Oscillatory Motion ◽  
Constant Speed ◽  
Main Task ◽  
Spectral Analyses ◽  
Arm Motion ◽  
Self Motion

Accurate control of grip force during object manipulation is necessary to prevent the object from slipping, especially to compensate for the action of gravitational and inertial forces resulting from hand/object motion. The goal of the current study was to assess whether the control of grip force was influenced by visually induced self-motion (i.e., vection), which would normally be accompanied by changes in object load. The main task involved holding a 400-g object between the thumb and the index finger while being seated within a virtual immersive environment that simulated the vertical motion of an elevator across floors. Different visual motions were tested, including oscillatory (0.21 Hz) and constant-speed displacements of the virtual scene. Different arm-loading conditions were also tested: with or without the hand-held object and with or without oscillatory arm motion (0.9 Hz). At the perceptual level, ratings from participants showed that both oscillatory and constant-speed motion of the elevator rapidly induced a long-lasting sensation of self-motion. At the sensorimotor level, vection compellingness altered arm movement control. Spectral analyses revealed that arm motion was entrained by the oscillatory motion of the elevator. However, we found no evidence that grip force used to hold the object was visually affected. Specifically, spectral analyses revealed no component in grip force that would mirror the virtual change in object load associated with the oscillatory motion of the elevator, thereby allowing the grip-to-load force coupling to remain unaffected. Altogether, our findings show that the neural mechanisms underlying vection interfere with arm movement control but do not interfere with the delicate modulation of grip force. More generally, those results provide evidence that the strength of the coupling between the sensorimotor system and the perceptual level can be modulated depending on the effector.

scholarly journals Velocity Modulation of Optical Flow Affects Self-Motion Perception during Body Motion

i-Perception ◽  
10.1068/ic858 ◽  
2011 ◽  
Vol 2 (8) ◽  
pp. 858-858
Author(s):  
Tomoko Yonemura ◽  
Shin Okamoto ◽  
Hiroki Kawasaki ◽  
Daisuke Kondo ◽  
Yuki Hashimoto ◽  
...  
Keyword(s):  
Optical Flow ◽  
Motion Perception ◽  
Body Motion ◽  
Velocity Modulation ◽  
Self Motion

scholarly journals Causal inference accounts for heading perception in the presence of object motion

2019 ◽  
Vol 116 (18) ◽  
pp. 9060-9065 ◽  
Author(s):  
Kalpana Dokka ◽  
Hyeshin Park ◽  
Michael Jansen ◽  
Gregory C. DeAngelis ◽  
Dora E. Angelaki
Keyword(s):  
Causal Inference ◽  
Virtual World ◽  
Moving Objects ◽  
Object Motion ◽  
Image Motion ◽  
Inference Problem ◽  
Accuracy And Precision ◽  
The World ◽  
Self Motion ◽  
The Brain

The brain infers our spatial orientation and properties of the world from ambiguous and noisy sensory cues. Judging self-motion (heading) in the presence of independently moving objects poses a challenging inference problem because the image motion of an object could be attributed to movement of the object, self-motion, or some combination of the two. We test whether perception of heading and object motion follows predictions of a normative causal inference framework. In a dual-report task, subjects indicated whether an object appeared stationary or moving in the virtual world, while simultaneously judging their heading. Consistent with causal inference predictions, the proportion of object stationarity reports, as well as the accuracy and precision of heading judgments, depended on the speed of object motion. Critically, biases in perceived heading declined when the object was perceived to be moving in the world. Our findings suggest that the brain interprets object motion and self-motion using a causal inference framework.

Optical Flow and Texture Variables Useful for Detecting Changes in Simulated Self Motion

1983 ◽  
Vol 27 (12) ◽  
pp. 996-1000
Author(s):  
Dean H. Owen ◽  
Lawrence J. Hettinger ◽  
Shirley B. Tobias ◽  
Lawrence Wolpert ◽  
Rik Warren
Keyword(s):  
Optical Flow ◽  
Flow Pattern ◽  
High Speed ◽  
Flight Simulator ◽  
Practical Relevance ◽  
Motion Information ◽  
Flow Acceleration ◽  
Level Flight ◽  
Texture Density ◽  
Self Motion

Several methods are presented for breaking linkages among global optical flow and texture variables in order to assess their usefulness in experiments requiring observers to distinguish change in speed or heading of simulated self motion from events representing constant speed or level flight. Results of a series of studies testing for sensitivity to flow acceleration or deceleration, flow-pattern expansion variables, and the distribution of optical texture density are presented. Theoretical implications for determining the metrics of visual self-motion information, and practical relevance for pilot and flight simulator evaluation and for low-level, high-speed flight are discussed.

scholarly journals Dissociation of Self-Motion and Object Motion by Linear Population Decoding That Approximates Marginalization

2017 ◽  
Vol 37 (46) ◽  
pp. 11204-11219 ◽  
Author(s):  
Ryo Sasaki ◽  
Dora E. Angelaki ◽  
Gregory C. DeAngelis
Keyword(s):  
Object Motion ◽  
Self Motion ◽  
Population Decoding
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