Stereomotion processing in the human occipital cortex

Likova, Lora T.; Tyler, Christopher W.

doi:10.1016/j.neuroimage.2007.06.039

Cited by 56 publications

(80 citation statements)

References 96 publications

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“…Given that these same cortical regions process not only visual motion signals but also the disparity and motion-in-depth signals that guide vergence tracking (e.g. Likova and Tyler, 2007; Rokers et al, 2009; Cottereau et al, 2011, 2014), our finding that the gain in vergence tracking is reduced in patients with schizophrenia is consistent with these previous findings. Further studies are therefore clearly needed that use psychophysics and fMRI to investigate the processing of both cyclopean and non-cyclopean disparity and motion-in-depth signals in patients with schizophrenia.…”

Section: Discussionsupporting

confidence: 91%

Vergence eye movements in patients with schizophrenia

et al. 2014

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Previous studies have shown that smooth pursuit eye movements are impaired in patients with schizophrenia. However, under normal viewing conditions, targets move not only in the frontoparallel plane but also in depth, and tracking them requires both smooth pursuit and vergence eye movements. Although previous studies in humans and non-human primates suggest that these two eye movement subsystems are relatively independent of one another, to our knowledge, there have been no prior studies of vergence tracking behavior in patients with schizophrenia. Therefore, we have investigated these eye movements in patients with schizophrenia and in healthy controls. We found that patients with schizophrenia exhibited substantially lower gains compared to healthy controls during vergence tracking at all tested speeds (e.g. 0.25 Hz vergence tracking mean gain of 0.59 vs. 0.86). Further, consistent with previous reports, patients with schizophrenia exhibited significantly lower gains than healthy controls during smooth pursuit at higher target speeds (e.g. 0.5 Hz smooth pursuit mean gain of 0.64 vs. 0.73). In addition, there was a modest (r≈0.5), but significant, correlation between smooth pursuit and vergence tracking performance in patients with schizophrenia. Our observations clearly demonstrate substantial vergence tracking deficits in patients with schizophrenia. In these patients, deficits for smooth pursuit and vergence tracking are partially correlated suggesting overlap in the central control of smooth pursuit and vergence eye movements.

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Section: Discussionsupporting

confidence: 91%

Vergence eye movements in patients with schizophrenia

et al. 2014

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“…However, the mixed physiological and psychophysical evidence for the use of IOVD (and CD) signals did prompt some human neuroimaging studies, which found CD-selective (Likova & Tyler 2007) and then CD- and IOVD-driven (Rokers et al 2009) responses in and around human MT.…”

Section: Brain Mechanisms For 3d Motion Informationmentioning

confidence: 99%

Binocular Mechanisms of 3D Motion Processing

Cormack

Czuba

Knöll

et al. 2017

Annu. Rev. Vis. Sci.

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The visual system must recover important properties of the external environment if its host is to survive. Because the retinae are effectively two-dimensional but the world is three-dimensional (3D), the patterns of stimulation both within and across the eyes must be used to infer the distal stimulus—the environment—in all three dimensions. Moreover, animals and elements in the environment move, which means the input contains rich temporal information. Here, in addition to reviewing the literature, we discuss how and why prior work has focused on purported isolated systems (e.g., stereopsis) or cues (e.g., horizontal disparity) that do not necessarily map elegantly on to the computations and complex patterns of stimulation that arise when visual systems operate within the real world. We thus also introduce the binoptic flow field (BFF) as a description of the 3D motion information available in realistic environments, which can foster the use of ecologically valid yet well-controlled stimuli. Further, it can help clarify how future studies can more directly focus on the computations and stimulus properties the visual system might use to support perception and behavior in a dynamic 3D world.

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“…Furthermore, it seems possible that velocity constraints may be processed in the ventral stream and (dynamic) binocular disparity and other depth cues in the dorsal stream [16]. It is also neuroanatomically and neurophysiologically plausible that integration of motion and disparity occurs late in subregions of human MT/V5 [14,20] if not in areas beyond human MT/MST [13].…”

Section: Discussionmentioning

confidence: 99%

A Bayesian approach to the aperture problem of 3D motion perception

Wang

Heron

Moreland

et al. 2012

2012 International Conference on 3D Imaging (IC3D)

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We suggest a geometric-statistical approach that can be applied to the 3D aperture problem of motion perception. In simulations and psychophysical experiments we study perceived 3D motion direction in a binocular viewing geometry by systematically varying 3D orientation of a line stimulus moving behind a circular aperture. Although motion direction is inherently ambiguous perceived directions show systematic trends and a Bayesian model with a prior for small depth followed by slow motion in 3D gives reasonable fits to individual data. We conclude that the visual system tries to minimize velocity in 3D but that earlier disparity processing strongly influences perceived 3D motion direction. We discuss implications for the integration of disparity and motion cues in the human visual system.

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Stereomotion processing in the human occipital cortex

Cited by 56 publications

References 96 publications

Vergence eye movements in patients with schizophrenia

Vergence eye movements in patients with schizophrenia

Binocular Mechanisms of 3D Motion Processing

A Bayesian approach to the aperture problem of 3D motion perception

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