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Psychophysical evidence for two routes to suppression before binocular summation of signals in human vision

By D.H. Baker, T.S. Meese and R.J. Summers


Visual mechanisms in primary visual cortex are suppressed by the superposition of gratings perpendicular to their preferred orientations. A clear picture of this process is needed to (i) inform functional architecture of image-processing models, (ii) identify the pathways available to support binocular rivalry, and (iii) generally advance our understanding of early vision. Here we use monoptic sine-wave gratings and cross-orientation masking (XOM) to reveal two cross-oriented suppressive pathways in humans, both of which occur before full binocular summation of signals. One is a within-eye (ipsiocular) pathway that is spatially broadband, immune to contrast adaptation and has a suppressive weight that tends to decrease with stimulus duration. The other pathway operates between the eyes (interocular), is spatially tuned, desensitizes with contrast adaptation and has a suppressive weight that increases with stimulus duration. When cross-oriented masks are presented to both eyes, masking is enhanced or diminished for conditions in which either ipsiocular or interocular pathways dominate masking, respectively. We propose that ipsiocular suppression precedes the influence of interocular suppression and tentatively associate the two effects with the lateral geniculate nucleus (or retina) and the visual cortex respectively. The interocular route is a good candidate for the initial pathway involved in binocular rivalry and predicts that interocular cross-orientation suppression should be found in cortical cells with predominantly ipsiocular drive

Topics: RE, RC0321, BF
Year: 2007
OAI identifier:
Provided by: e-Prints Soton

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  1. (2007). 435–448 446Bird CM, Henning GB, Wichmann FA (2002) Contrast discrimination with sinusoidal gratings of different spatial frequency.
  2. (2004). A fresh look at interocular grouping during binocular rivalry. Vision Res 44:983–991. doi
  3. (2006). A gain-control theory of binocular combination. doi
  4. (2003). A laminar cortical model of stereopsis and three-dimensional surface perception. Vision Res 43:801–829. doi
  5. (1989). A neural theory of binocular-rivalry. Psychol Rev 96:145–167. doi
  6. (1996). Activity changes in early visual cortex reflect monkeys’ percepts during binocular rivalry. doi
  7. (2002). Adaptation and gain pool summation: alternative models and masking data. Vision Res 42:1113–1125. doi
  8. (1996). Adaptation of visually evoked responses of relay cells in the dorsal lateral geniculate nucleus of the cat following prolonged exposure to drifting gratings. doi
  9. (1983). Added noise restores recognizability of coarse quantized images. doi
  10. (1997). Analysis of the effect of pattern adaptation on pattern pedestal effects: A two-process model. Vision Res 37:2781–2788. doi
  11. (2004). Area summation and masking. doi
  12. (2006). Binocular contrast vision at and above threshold. doi
  13. (1969). Binocular corresponding receptive fields of single units in the cat dorsal lateral geniculate nucleus. Vision Res 9:1297–1303. doi
  14. (1998). Binocular cross-orientation suppression in the cat’s striate cortex.
  15. (2007). Binocular interaction: Contrast matching and contrast discrimination are predicted by the same model. Spatial Vision, doi
  16. (2005). Binocular summation at contrast threshold: A new look. Perception 34:138–138.
  17. (2003). Computational evidence for a rivalry hierarchy in vision. doi
  18. (2007). Contextual modulation involves suppression and facilitation from the centre and the surround. J Vision, doi
  19. (1987). Contrast discrimination in noise. doi
  20. (1985). Contrast gain-control in the cats visual-system. doi
  21. (1980). Contrast masking in human-vision. doi
  22. (1987). Cross-orientation inhibition in cat is GABA mediated. doi
  23. (2005). Cross-orientation suppression: monoptic and dichoptic mechanisms are different.
  24. (1999). Development of rivalry and dichoptic masking in human infants.
  25. (2004). Dichoptic visual masking reveals that early binocular neurons exhibit weak interocular suppression: implications for binocular vision and visual awareness. doi
  26. (1998). Different mechanisms underlie three inhibitory phenomena in cat area 17. Vision Res 38:2067–2080. doi
  27. (2006). Dynamics of suppression in macaque primary visual cortex.
  28. (2005). Early and late mechanisms of surround suppression in striate cortex of macaque. doi
  29. (2005). Eye-specific effects of binocular rivalry in the human lateral geniculate nucleus. doi
  30. (1996). Feher A doi
  31. (1973). Fiorenti A
  32. (1982). Functional implications of cross-orientation inhibition of cortical visual cells. 1. Neurophysiological evidence. doi
  33. (1994). Human luminance pattern-vision mechanisms: masking experiments require a new model. doi
  34. (1979). Humans deprived of normal binocular vision have binocular interactions tuned to size and orientation. doi
  35. (1988). Interactions among spatial-frequency and orientation channels adapted concurrently. Vision Res 28:1303–1310. doi
  36. (1978). Interactions between spatial-frequency channels. Vision Res 18:951–958. doi
  37. (1995). Interocular suppression in the primary visual-cortex: a possible neural basis of binocularrivalry. doi
  38. (2005). Interocular suppression is gated by interocular feature matching. Vision Res 45:9–15. doi
  39. (2005). Intracortical origins of interocular suppression in the visual cortex. doi
  40. (1972). Lateral geniculate neurons of cat: retinal inputs and physiology.
  41. (1999). Long-range interactions modulate the contrast gain in the lateral geniculate nucleus of cats. doi
  42. (2004). Low spatial frequencies are suppressively masked across spatial scale, orientation, field position, and eye of origin. doi
  43. (1973). Masking in visual recognition: effects of 2-dimensional filtered noise. doi
  44. (2006). Mechanisms underlying cross-orientation suppression in cat visual cortex. doi
  45. (1997). Model of visual contrast gain control and pattern masking. doi
  46. (1995). Modelling the increase of contrast sensitivity with grating area and exposure time. Vision Res 35:2339–2346. doi
  47. (2006). Monocular texture segmentation and proto-rivalry. Vision Res 46:1488–1492. doi
  48. (2007). Neural recoding in human pattern vision: model and mechanisms. Vision Res 39:231–256. doi
  49. (2000). Neuronal activity in human primary visual cortex correlates with perception during binocular rivalry.
  50. (1992). Normalization of cell responses in cat striate cortex. Vis Neurosci 9:181–197. doi
  51. (1987). On the relation between summation and facilitation. doi
  52. (2006). Origins of cross-orientation suppression in the visual cortex.
  53. (1998). Pattern adaptation and cross-orientation interactions in the primary visual cortex. doi
  54. (1979). Pattern-selective adaptation in visual cortical-neurons. doi
  55. (1979). Probability summation over time. Vision Res 19:515–522. doi
  56. (2004). Profound contrast adaptation early in the visual pathway. doi
  57. (1996). Psychophysics of suppression. doi
  58. (1975). Reaction times in the detection of gratings by human observers: A probabilistic mechanism. doi
  59. (1959). Receptive fields of single neurones in the cat’s visual cortex. doi
  60. (1989). Role of inhibition in the specification of orientation selectivity of cells in the cat striate cortex. doi
  61. (2002). Seeing in depth: Basic mechanisms. Ontario: I Porteous.
  62. (1965). Sequential estimation of points on a psychometric function. doi
  63. (1998). Single units and conscious vision. doi
  64. (1991). Single-unit and 2-deoxyglucose studies of side inhibition in macaque striate cortex. doi
  65. (2007). Spatial and temporal dependencies of cross-orientation suppression in human vision. doi
  66. (1984). Spatial contrast adaptation characteristics of neurons recorded in the cat’s visual-cortex. doi
  67. (1977). Spatial frequency adaptation can enhance contrast sensitivity. doi
  68. (1978). Spatial summation in receptive-fields of simple cells in cats striate cortex. doi
  69. (1979). Spatial-frequency masking in human-vision: binocular interactions. doi
  70. (1994). Stereo matching precedes dichoptic masking. Vision Res 34:1047–1060. doi
  71. (2002). Suppression without inhibition in visual cortex. doi
  72. (1978). Sustained and transient mechanisms in humanvision: temporal and spatial properties. Vision Res 18:69–81. doi
  73. (1987). Temporal properties of spatial contrast vision. doi
  74. (1989). The binocular input to cells in the feline dorsal lateral geniculate-nucleus (DLGN). doi
  75. (2006). The effect of spatial configuration on surround suppression of contrast sensitivity. doi
  76. (2005). The nature and depth of binocular rivalry suppression. In: Binocular rivalry (Alais doi
  77. (2005). The suppressive field of neurons in lateral geniculate nucleus. doi
  78. (2005). Traveling waves of activity in primary visual cortex during binocular rivalry. doi
  79. (2005). Two distinct mechanisms of suppression in human vision. doi
  80. (1985). Uncertainty explains many aspects of visual contrast detection and discrimination. doi
  81. (2005). Visibility, visual awareness, and visual masking of simple unattended targets are confined to areas in the occipital cortex beyond human V1/V2. Proc Natl Acad SciUSA102:17178–17183. doi
  82. (1996). What is rivalling during binocular rivalry? doi

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