Can Illusory Motion Disrupt Tracking Real Motion?

Perception ◽  
1997 ◽  
Vol 26 (3) ◽  
pp. 269-275 ◽  
Author(s):  
Timothy J Andrews ◽  
Allison N McCoy
Keyword(s):  
Motion Perception ◽  
Retinal Image ◽  
Optokinetic Nystagmus ◽  
Neural Representation ◽  
Illusory Motion ◽  
Brain Areas ◽  
Critical Rate ◽  
Real Motion ◽  
Actual Motion ◽  
Perceived Motion

When rotating stripes or other periodic stimuli cross the retina at a critical rate, a reversal in the direction of motion of the stimuli is often seen. This illusion of motion perception was used to explore the roles of retinal and perceived motion in the generation of optokinetic nystagmus. Here we show that optokinetic nystagmus is disrupted during the perception of this illusion. Thus, when perceived and actual motion are in conflict, subjects fail to track the veridical movement. This observation suggests that the perception of motion can directly influence optokinetic nystagmus, even in the presence of a moving retinal image. A conflict in the neural representation of motion in different brain areas may explain these findings.

Induced Motion Considered as a Visually Induced Oculogyral Illusion

Perception ◽  
1986 ◽  
Vol 15 (2) ◽  
pp. 131-138 ◽  
Author(s):  
Robert B Post
Keyword(s):  
Optokinetic Nystagmus ◽  
Optokinetic Stimulation ◽  
Fixation Target ◽  
Illusory Motion ◽  
Reverse Phase ◽  
Ocular Pursuit ◽  
Stationary Stimulus ◽  
Oculogyral Illusion ◽  
Induced Motion ◽  
Perceived Motion

The possibility that nystagmus suppression contributes to illusory motion was investigated by measuring perceived motion of a stationary stimulus following the removal of an optokinetic stimulus. This was done because optokinetic nystagmus typically outlasts cessation of an optokinetic stimulus. Therefore, it would be expected that a stationary fixated stimulus should appear to move after removal of an optokinetic stimulus if illusory motion results from nystagmus suppression. Illusory motion was reported for a stationary fixation target following optokinetic stimulation. This motion was reported first in the same direction as the preceding induced motion, then in the opposite direction. The two directions of illusory motion following optokinetic stimulation are interpreted as resulting from the use of smooth ocular pursuit to suppress first one phase of optokinetic afternystagmus and then the reverse phase. Implications for the origins of induced motion are discussed.

Different Neural Networks Are Involved in Audiovisual Speech Perception Depending on the Context

2014 ◽  
Vol 26 (7) ◽  
pp. 1572-1586 ◽  
Author(s):  
Nicole Malfait ◽  
Pierre Fonlupt ◽  
Laurie Centelles ◽  
Bruno Nazarian ◽  
Liana E. Brown ◽  
...  
Keyword(s):  
Speech Perception ◽  
Neural Representation ◽  
Audiovisual Speech ◽  
Source Information ◽  
Subcortical Structures ◽  
Brain Areas ◽  
Audiovisual Speech Perception ◽  
The Neural Network ◽  
Fmri Study ◽  
Production Areas

How are we able to easily and accurately recognize speech sounds despite the lack of acoustic invariance? One proposed solution is the existence of a neural representation of speech syllable perception that transcends its sensory properties. In the present fMRI study, we used two different audiovisual speech contexts both intended to identify brain areas whose levels of activation would be conditioned by the speech percept independent from its sensory source information. We exploited McGurk audiovisual fusion to obtain short oddball sequences of syllables that were either (a) acoustically different but perceived as similar or (b) acoustically identical but perceived as different. We reasoned that, if there is a single network of brain areas representing abstract speech perception, this network would show a reduction of activity when presented with syllables that are acoustically different but perceived as similar and an increase in activity when presented with syllables that are acoustically similar but perceived as distinct. Consistent with the long-standing idea that speech production areas may be involved in speech perception, we found that frontal areas were part of the neural network that showed reduced activity for sequences of perceptually similar syllables. Another network was revealed, however, when focusing on areas that exhibited increased activity for perceptually different but acoustically identical syllables. This alternative network included auditory areas but no left frontal activations. In addition, our findings point to the importance of subcortical structures much less often considered when addressing issues pertaining to perceptual representations.

scholarly journals Halt and recovery of illusory motion perception from peripherally viewed static images

2011 ◽  
Vol 73 (6) ◽  
pp. 1823-1832 ◽  
Author(s):  
Erika Tomimatsu ◽  
Hiroyuki Ito ◽  
Shoji Sunaga ◽  
Gerard B. Remijn
Keyword(s):  
Motion Perception ◽  
Illusory Motion ◽  
Static Images

Quantification of monocular optokinetic nystagmus asymmetries and motion perception with motion-nulling techniques

1993 ◽  
Vol 10 (8) ◽  
pp. 1835 ◽  
Author(s):  
E. Eugenie Hartmann ◽  
Annemarie Succop ◽  
Avery H. Weiss ◽  
Davida Y. Teller ◽  
Steven L. Buck
Keyword(s):  
Motion Perception ◽  
Optokinetic Nystagmus

Topography of evoked potentials associated with illusory motion perception as a motion aftereffect

2002 ◽  
Vol 13 (1) ◽  
pp. 75-84 ◽  
Author(s):  
Yuji Kobayashi ◽  
Aihide Yoshino ◽  
Tsuneyuki Ogasawara ◽  
Soichiro Nomura
Keyword(s):  
Evoked Potentials ◽  
Motion Perception ◽  
Motion Aftereffect ◽  
Illusory Motion

scholarly journals Neural correlates of illusory motion perception in Drosophila

2011 ◽  
Vol 108 (23) ◽  
pp. 9685-9690 ◽  
Author(s):  
J. C. Tuthill ◽  
M. E. Chiappe ◽  
M. B. Reiser
Keyword(s):  
Motion Perception ◽  
Neural Correlates ◽  
Illusory Motion

‘Generic-View Principle’ for Three-Dimensional-Motion Perception: Optics and Inverse Optics of a Moving Straight Bar

Perception ◽  
1996 ◽  
Vol 25 (7) ◽  
pp. 797-814 ◽  
Author(s):  
Michiteru Kitazaki ◽  
Shinsuke Shimojo
Keyword(s):  
Visual System ◽  
Motion Perception ◽  
Retinal Image ◽  
General Framework ◽  
Three Dimensional ◽  
Image Motion ◽  
Optical Process ◽  
Retinal Image Motion ◽  
The Subject ◽  
Three Components

The generic-view principle (GVP) states that given a 2-D image the visual system interprets it as a generic view of a 3-D scene when possible. The GVP was applied to 3-D-motion perception to show how the visual system decomposes retinal image motion into three components of 3-D motion: stretch/shrinkage, rotation, and translation. First, the optical process of retinal image motion was analyzed, and predictions were made based on the GVP in the inverse-optical process. Then experiments were conducted in which the subject judged perception of stretch/shrinkage, rotation in depth, and translation in depth for a moving bar stimulus. Retinal-image parameters—2-D stretch/shrinkage, 2-D rotation, and 2-D translation—were manipulated categorically and exhaustively. The results were highly consistent with the predictions. The GVP seems to offer a broad and general framework for understanding the ambiguity-solving process in motion perception. Its relationship to other constraints such as that of rigidity is discussed.

scholarly journals Type of Featural Attention Differentially Modulates hMT+ Responses to Illusory Motion Aftereffects

2009 ◽  
Vol 102 (5) ◽  
pp. 3016-3025 ◽  
Author(s):  
Miguel Castelo-Branco ◽  
Lajos R. Kozak ◽  
Elia Formisano ◽  
João Teixeira ◽  
João Xavier ◽  
...  
Keyword(s):  
Selective Attention ◽  
Motion Aftereffect ◽  
Human Motion ◽  
Real Surface ◽  
Illusory Motion ◽  
Real Motion ◽  
Motion Signal ◽  
Color Features ◽  
Motion Aftereffects ◽  
Global Activity

Activity in the human motion complex (hMT+/V5) is related to the perception of motion, be it either real surface motion or an illusion of motion such as apparent motion (AM) or motion aftereffect (MAE). It is a long-lasting debate whether illusory motion-related activations in hMT+ represent the motion itself or attention to it. We have asked whether hMT+ responses to MAEs are present when shifts in arousal are suppressed and attention is focused on concurrent motion versus nonmotion features. Significant enhancement of hMT+ activity was observed during MAEs when attention was focused either on concurrent spatial angle or color features. This observation was confirmed by direct comparison of adapting (MAE inducing) versus nonadapting conditions. In contrast, this effect was diminished when subjects had to report on concomitant speed changes of superimposed AM. The same finding was observed for concomitant orthogonal real motion (RM), suggesting that selective attention to concurrent illusory or real motion was interfering with the saliency of MAE signals in hMT+. We conclude that MAE-related changes in the global activity of hMT+ are present provided selective attention is not focused on an interfering feature such as concurrent motion. Accordingly, there is a genuine MAE-related motion signal in hMT+ that is neither explained by shifts in arousal nor by selective attention.

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