Collinear facilitation in color vision

Huang, Pi-Chun; Mullen, Kathy T.; Hess, Robert F.

doi:10.1167/7.11.6

Cited by 19 publications

(11 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The present results demonstrate that orientation tuning is not unique to the M/L-opponent pathway and are consistent with a study in V1 of another dichromat—the gray squirrel—that reported identical orientation selectivity in cone-opponent and non-opponent neurons (Heimel et al, 2005). Our results are also consistent with recent fMRI and psychophysical studies in humans that provide evidence for orientation-selective responses to S-cone-isolating stimuli in V1 (Beaudot and Mullen, 2005; Huang et al, 2007; Sumner et al, 2008; Wade, 2009). …”

Section: Discussionsupporting

confidence: 92%

The Representation of S-Cone Signals in Primary Visual Cortex

Johnson¹,

Hooser²,

Fitzpatrick³

2010

J. Neurosci.

View full text Add to dashboard Cite

Recent studies of middle-wavelength-sensitive and long-wavelength-sensitive cone responses in primate primary visual cortex (V1) have challenged the view that color and form are represented by distinct neuronal populations. Individual V1 neurons exhibit hallmarks of both color and form processing (cone opponency and orientation selectivity), and many display cone interactions that do not fit classic chromatic/achromatic classifications. Comparable analysis of short-wavelength-sensitive (S) cone responses has yet to be achieved and is of considerable interest because S-cones are the basis for the primordial mammalian chromatic pathway. Using intrinsic and twophoton imaging techniques in the tree shrew, we assessed the properties of V1 layer 2/3 neurons responsive to S-cone stimulation. These responses were orientation selective, exhibited distinct spatiotemporal properties, and reflected integration of S-cone inputs via opponent, summing, and intermediate configurations. Our observations support a common framework for the representation of cone signals in V1, one that endows orientation-selective neurons with a range of chromatic, achromatic, and mixed response properties.

show abstract

Section: Discussionsupporting

confidence: 92%

The Representation of S-Cone Signals in Primary Visual Cortex

Johnson¹,

Hooser²,

Fitzpatrick³

2010

J. Neurosci.

View full text Add to dashboard Cite

show abstract

“…This transformation means that these cells respond to cues for form, such as boundaries and edges, and may take signals from color or black and white as needed. Neurophysiological evidence that V1 neurons can be both color-selective and orientation-selective is consistent with recent functional magnetic resonance imaging and psychophysical studies in humans showing orientation-selective responses to color stimuli (Beaudot and Mullen, 2005; Engel, 2005; Beaudot and Mullen, 2006; Huang et al, 2007; Sumner et al, 2008). The differences from the originally proposed double-opponent cell necessitate a revision of the model (Figure 3E).…”

Section: Striate Cortex Mechanismssupporting

confidence: 87%

Advances in Color Science: From Retina to Behavior

Conway¹,

Chatterjee²,

Field³

et al. 2010

J. Neurosci.

154

157

View full text Add to dashboard Cite

Color has become a premier model system for understanding how information is processed by neural circuits, and for investigating the relationships among genes, neural circuits, and perception. Both the physical stimulus for color and the perceptual output experienced as color are quite well characterized, but the neural mechanisms that underlie the transformation from stimulus to perception are incompletely understood. The past several years have seen important scientific and technical advances that are changing our understanding of these mechanisms. Here, and in the accompanying minisymposium, we review the latest findings and hypotheses regarding color computations in the retina, primary visual cortex, and higher-order visual areas, focusing on non-human primates, a model of human color vision.In trichromatic primates, including humans and Old World monkeys, there are three types of cone photoreceptors that are responsible for color vision ( Fig. 1 A, B). The cone classes are called L, M, and S because of their spectral-sensitivity peaks, which lie in the long-, middle-, and short-wavelength regions of the visible spectrum. These labels replace the misleading terms "red," "green," and "blue." Two physically distinct stimuli appear as different colors only if they produce different relative activations in at least two cone types; conversely, any pair of physically distinct stimuli that activate the cone types in the same relative amount appear the same, like the two yellows shown in Figure 1C. While photoreceptor responses are easily computed from the spectral distribution of the stimulus, there is no straightforward relationship between photoreceptor response and color (Hofer et al., 2005a;Shevell and Kingdom, 2008). The multitude of color phenomena, including color afterimages, color assimilation, neon-color spreading, color constancy, and colored shadows, is compelling because in many cases two physically identical stimuli are made to appear different colors, or two physically different stimuli are made to appear the same simply by changing the spatial or temporal context (Fig. 2). A full description of the neural machinery for color should account for these observations, as well as more cognitive phenomena involving the relationship between experience, language, memory, emotion and color. The neural basis of color has been reviewed previously from a range of perspectives (Gegenfurtner, 2003;Gegenfurtner and Kiper, 2003;Lennie and Movshon, 2005;Sincich and Horton, 2005;Solomon and Lennie, 2007;Conway, 2009;Dobkins, 2009;Jacobs and Nathans, 2009;Stockman and Brainard, 2010). Here we focus on advances and pressing questions regarding the mechanisms of color in retina, striate cortex, and extrastriate cortex of non-human primates, although we note that other species are emerging as excellent model systems of color processing (Lotto and Chittka, 2005;Van Hooser and Nelson, 2006;Osorio and Vorobyev, 2008;Borst, 2009;Johnson et al., 2010;Srinivasan, 2010). Retinal mechanismsA single cone by itself is color blind b...

show abstract

“…A similar argument against uncertainty reduction has been elaborated by Chen and Tyler (2008). Morgan and Dresp (1995), Williams and Hess (1998), Huang and Hess (2007), Huang, Mullen, and Hess (2007), Summers and Meese (2009), Meese and Baker (2009), and Wu and Chen (2010) also presented data that prompted them to rule out uncertainty reduction as the cause of flanker facilitation.…”

Section: Discussionsupporting

confidence: 52%

Psychometric functions for detection and discrimination with and without flankers

Garcı́a-Pérez

Alcalá-Quintana

Woods

et al. 2011

Atten Percept Psychophys

View full text Add to dashboard Cite

Recent studies have reported that flanking stimuli broaden the psychometric function and lower detection thresholds. In the present study, we measured psychometric functions for detection and discrimination with and without flankers to investigate whether these effects occur throughout the contrast continuum. Our results confirm that lower detection thresholds with flankers are accompanied by broader psychometric functions. Psychometric functions for discrimination reveal that discrimination thresholds with and without flankers are similar across standard levels, and that the broadening of psychometric functions with flankers disappears as standard contrast increases, to the point that psychometric functions at high standard levels are virtually identical with or without flankers. Threshold-versus-contrast (TvC) curves with flankers only differ from TvC curves without flankers in occasional shallower dippers and lower branches on the left of the dipper, but they run virtually superimposed at high standard levels. We discuss differences between our results and other results in the literature, and how they are likely attributed to the differential vulnerability of alternative psychophysical procedures to the effects of presentation order. We show that different models of flanker facilitation can fit the data equally well, which stresses that succeeding at fitting a model does not validate it in any sense.

show abstract

Collinear facilitation in color vision

Cited by 19 publications

References 62 publications

The Representation of S-Cone Signals in Primary Visual Cortex

The Representation of S-Cone Signals in Primary Visual Cortex

Advances in Color Science: From Retina to Behavior

Psychometric functions for detection and discrimination with and without flankers

Contact Info

Product

Resources

About