Interaction of ON and OFF pathways for visual contrast measurement

Neumann, Heiko; Pessoa, Luiz; Hansen, Thorsten

doi:10.1007/s00422-008-0225-1

Cited by 12 publications

(3 citation statements)

References 41 publications

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“…Also, Nirenberg and Meister (1997) have shown that transient and motion-sensitive responses in ganglion cells may be produced by self-inhibitory feedback of the amacrine cells in mouse retina (for similar results, see Berry, Brivanlou, Jordan, & Meister, 1999;Victor, 1987;Crevier & Meister, 1998). Computational models also suggested that self-inhibition may exist in cells sensitive to light-dark contrast (Neumann, Pessoa, & Hanse, 1999). Disinhibition can effectively reduce the amount of inhibition where there is a large area of bright input, and self-inhibitioncan give rise to oscillations in the response over time.…”

Section: Scintillating Gridmentioning

confidence: 84%

A Neural Model of the Scintillating Grid Illusion: Disinhibition and Self-Inhibition in Early Vision

Yu¹,

Choe

2006

Neural Computation

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A stationary display of white discs positioned on intersecting gray bars on a dark background gives rise to a striking scintillating effect--the scintillating grid illusion. The spatial and temporal properties of the illusion are well known, but a neuronal-level explanation of the mechanism has not been fully investigated. Motivated by the neurophysiology of the Limulus retina, we propose disinhibition and self-inhibition as possible neural mechanisms that may give rise to the illusion. In this letter, a spatiotemporal model of the early visual pathway is derived that explicitly accounts for these two mechanisms. The model successfully predicted the change of strength in the illusion under various stimulus conditions, indicating that low-level mechanisms may well explain the scintillating effect in the illusion.

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Section: Scintillating Gridmentioning

confidence: 84%

A Neural Model of the Scintillating Grid Illusion: Disinhibition and Self-Inhibition in Early Vision

Yu¹,

Choe

2006

Neural Computation

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“…2) led us to hypothesize about the potential role of recurrent inhibition giving rise to disinhibition. Disinhibition is the inhibition of other inhibitory factors, resulting in a net excitatory effect on the initial target, and it includes recurrent inhibition as a particular case (see Neumann et al 1999;Yu 2006 for other nonrecurrent forms of disinhibition). Figure 4 demonstrates the recurrent feedback network structure proposed by Carpenter and Blakemore (1973) which could account for the observed properties of angle expansion.…”

Section: Column-level Inhibition and Disinhibitionmentioning

confidence: 99%

Neural model of disinhibitory interactions in the modified Poggendorff illusion

Choe

2007

Biol Cybern

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Visual illusions can be strengthened or weakened with the addition of extra visual elements. For example, in the Poggendorff illusion, with an additional bar added, the illusory skew in the perceived angle can be enlarged or reduced. In this paper, we show that a nontrivial interaction between lateral inhibitory processes in the early visual system (i.e., disinhibition) can explain such an enhancement or degradation of the illusory effect. The computational model we derived successfully predicted the perceived angle in the Poggendorff illusion task that was modified to include an extra thick bar. The concept of disinhibition employed in the model is general enough that we expect it can be further extended to account for other classes of geometric illusions.

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“…al. [15] estudaram o efeito do contraste nos PG via sua proposta de um modelo para medida de contraste visual, verificaram que variações de contraste têm pouca influência na percepção global dos PG.…”

Section: Trabalhos Anterioresunclassified