Effects of interactions of two moving lines on single unit responses in the cat's visual cortex

Phelps, Robert W.

doi:10.1016/0042-6989(74)90011-x

Cited by 13 publications

(7 citation statements)

References 11 publications

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“…Next they varied the distance between two parallel lines and found that the maximum response first rose, then fell, then returned to the level of response when only one line was presented. Phelps (1974), however, reported various kinds of interaction produced by moving parallel lines: when the interline separation was varied, 40010 of units showed inhibition only, 11% showed enhanced output only, 14% showed inhibition then enhancement, 17% showed the reverse, with 6% and 3%, respectively, showing inhibition/ enhailcement/inhibition and enhancement/inhibition/ /enhancement, while 9% of the cells showed no effect of varying interline separation. The results of Burns and Pritchard, then, appear to bear more on the effects of lateral separation in the spatial domain than on TILT ILLUSION 495 angular separation in the orientation domain, to which the effects of various angle patterns would be more relevant.…”

Section: Resultsmentioning

confidence: 99%

“…The results of Burns and Pritchard, then, appear to bear more on the effects of lateral separation in the spatial domain than on TILT ILLUSION 495 angular separation in the orientation domain, to which the effects of various angle patterns would be more relevant. The predictions for the coding of angles and interactions between orientations from the data of Burns and Pritchard must be viewed as tentative at best, since opposite predictions can be made from each of the types of response observed by Phelps (1974), of which the type of response reported by Burns and Pritchard (1971) appears to be a subset. Wenderoth, Beh, and White (1978a) suggested that the orientation of a line is signaled by the weighted ouputs of orientation analyzers which process short sublengths of a line.…”

Section: Resultsmentioning

confidence: 99%

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The tilt illusion: Length and luminance changes of induction line and third (disinhibiting) line

O’Toole

1979

Perception & Psychophysics

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Direct effects (acute-angle expansion) and indirect effects (acute angle contraction) aspects of the tilt illusion were reduced by reductions in the length as well as the luminance of the induction line, and also by the addition of a third line to the display. When this third (disinhibiting) line was also reduced in length and luminance, the reduction in the illusion became less and the illusion increased in magnitude. The illusion size was also changed by increasing the orientation difference between the disinhibiting line and the induction line. It is argued that these effects are mediated by (lateral) inhibition and disinhibition between mechanisms responsible for orientation coding in the visual system.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

The tilt illusion: Length and luminance changes of induction line and third (disinhibiting) line

O’Toole

1979

Perception & Psychophysics

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“…The formalism may be applied to a variety of neurophysiological areas, e.g. the oculomotor system, auditory pattern recognition, visual processing in vertebrates (see, for instance, St-Cyr & Fender, 1969;Wilson, 1974;Atkinson & Campbell, 1973;Henning, Hertz & Broadbent, 1975;Phelps, 1974;Kelly, 1972). Secondly, the formalism of chapter 3, providing a kind of canonical representation of spatio-temporal parallel processing, can classify the t The term 'nonlinear' is used in the sense 'not restricted to be linear'.…”

Section: Spatial Parallel Processingmentioning

confidence: 99%

Visual control of orientation behaviour in the fly: Part II. Towards the underlying neural interactions

Poggio

Reichardt

1976

Quart. Rev. Biophys.

218

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Visual information processing in the nervous system of flies begins with a large array of photoreceptors, which transduce a light intensity pattern, and culminates in a behavioural response that depends on that pattern.In the previous paper we have given a quantitative description of visual control of flight orientation in the fly. This description can account for fixation, tracking and some instances of spontaneous pattern preference behaviour. The phenomenological theory outlines the basic logical organization of the visual control system of the fly. It requires the neural network between the receptors and the flight muscles to perform two main computations on the visual input. One computation extracts movement information (the term r(ψ)ψ b of the phenomenological equation). The other provides position information (the term D(ψ)).

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“…The other kind provides information regarding the motion of objects relative to each other and is called relative cues or object-relative cues (Wallach, 1959). There is physiological evidence for the distinction between absolute and relative cues (Bridgeman, 1972;Burns, Gassanov & Webb, 1972;Phelps, 1974;Mandl, 1974). Psychophysical evidence for this distinction comes from two types of experiments.…”

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confidence: 99%

Perceived velocity as a function of reference mark density

Gogel

1983

Scandinavian J Psychology

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The effect on apparent visual speed of varying the density of stationary reference marks evenly distributed along the path of motion of a point of light was measured using tactile comparison motion. The sensitivity of the tactile method of measuring visual speed was supported by the finding that the tactile measures increased with each increase in physical speed of the point of light, other factors held constant. This procedure was applied in two experiments to visual displays in which the physical speed, extent of motion, and number and density of reference marks was varied. Only reference mark density, in addition to physical speed, was found to be a signficant (and robust) factor in determining perceived speed. The effect of reference mark density is explained in terms of the increasing contribution of relative motion cues to the perception of visual speed as a funciton of the average separation (or average adjacency) of the moving point from surrounding reference marks.

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Effects of interactions of two moving lines on single unit responses in the cat's visual cortex

Cited by 13 publications

References 11 publications

The tilt illusion: Length and luminance changes of induction line and third (disinhibiting) line

The tilt illusion: Length and luminance changes of induction line and third (disinhibiting) line

Visual control of orientation behaviour in the fly: Part II. Towards the underlying neural interactions

Perceived velocity as a function of reference mark density

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