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Temporal resolution of dichoptic and second-order motion mechanisms.
Derrington A, Cox M. Derrington A, et al. Vision Res. 1998 Nov;38(22):3531-9. doi: 10.1016/s0042-6989(98)00050-9. Vision Res. 1998. PMID: 9893787
Three human observers were required to discriminate the direction of motion of either sinusoidal gratings (1 c/deg), used as a stimulus for first-order motion analysers, or the envelopes of contrast-modulated stationary sinusoidal gratings (carrier frequency 5 c/deg, carri …
Three human observers were required to discriminate the direction of motion of either sinusoidal gratings (1 c/deg), used as a stimul …
Long-range interactions in the lateral geniculate nucleus of the New-World monkey, Callithrix jacchus.
Felisberti F, Derrington AM. Felisberti F, et al. Among authors: derrington am. Vis Neurosci. 2001 Mar-Apr;18(2):209-18. doi: 10.1017/s0952523801182064. Vis Neurosci. 2001. PMID: 11417796
Hence, we compare the effect of long-range interactions in parvocellular and magnocellular LGN layers of the marmoset monkey Callithrix jacchus using optimal, incremental spots flashed on the classical receptive field either alone or simultaneously with the shift of a grat …
Hence, we compare the effect of long-range interactions in parvocellular and magnocellular LGN layers of the marmoset monkey Callithrix jacc …
Vision: can colour contribute to motion?
Derrington AM. Derrington AM. Curr Biol. 2000 Apr 6;10(7):R268-70. doi: 10.1016/s0960-9822(00)00403-6. Curr Biol. 2000. PMID: 10753737 Review.
Whether colour patterns that have no luminance variation can evoke the perception of visual motion has long been a controversial issue. ...
Whether colour patterns that have no luminance variation can evoke the perception of visual motion has long been a controversial issu …
Long-range interactions modulate the contrast gain in the lateral geniculate nucleus of cats.
Felisberti F, Derrington AM. Felisberti F, et al. Among authors: derrington am. Vis Neurosci. 1999 Sep-Oct;16(5):943-56. doi: 10.1017/s0952523899165143. Vis Neurosci. 1999. PMID: 10580730
The stimuli consisted of a central spot of optimal size and polarity (contrast range: 3-98%), flashed alone or in the presence of a peripheral annulus (radii: 5-15 deg) containing a low spatial-frequency grating displaced at saccade-like velocities (shift). . …
The stimuli consisted of a central spot of optimal size and polarity (contrast range: 3-98%), flashed alone or in the presence of …
Peripheral shift reduces visual sensitivity in cat geniculate neurones.
Derrington AM, Felisberti F. Derrington AM, et al. Vis Neurosci. 1998 Sep-Oct;15(5):875-80. doi: 10.1017/s0952523898155128. Vis Neurosci. 1998. PMID: 9764530
The sudden displacement of the retinal image during a saccade raises the visual threshold of human observers to foveal stimuli. ...The lateral geniculate nucleus (LGN) is a likely locus for the multiple retinal and extraretinal interactions occurring during saccadic …
The sudden displacement of the retinal image during a saccade raises the visual threshold of human observers to foveal stimuli. ...Th …
Second-order motion discrimination by feature-tracking.
Derrington AM, Ukkonen OI. Derrington AM, et al. Vision Res. 1999 Apr;39(8):1465-75. doi: 10.1016/s0042-6989(98)00227-2. Vision Res. 1999. PMID: 10343815
When a plaid pattern (the sum of two high spatial frequency gratings oriented +/- 84 degrees from vertical) jumps horizontally by 3/8 of its spatial period its contrast envelope, a second-order pattern, moves in the opposite direction to its luminance waveform. ...W …
When a plaid pattern (the sum of two high spatial frequency gratings oriented +/- 84 degrees from vertical) jumps horizontally by 3/8 …
Rapid colour-specific detection of motion in human vision.
Cropper SJ, Derrington AM. Cropper SJ, et al. Among authors: derrington am. Nature. 1996 Jan 4;379(6560):72-4. doi: 10.1038/379072a0. Nature. 1996. PMID: 8538743
A control experiment, in which a static luminance 'mask' is added to the moving colour pattern, proves that discrimination of the direction of motion of these brief stimuli is colour-specific. The mask drastically impairs discrimination of the direction of motion of
A control experiment, in which a static luminance 'mask' is added to the moving colour pattern, proves that discrimination of
Implications of motion detection for early non-linearities.
Derrington AM, Henning GB. Derrington AM, et al. Ciba Found Symp. 1994;184:211-20; discussion 220-6, 269-71. doi: 10.1002/9780470514610.ch11. Ciba Found Symp. 1994. PMID: 7882755 Review.
Non-linear transformation of contrast-modulated patterns would give rise to a component (a distortion product) that varies on the same spatial scale as the contrast variation; this can be analysed to extract motion. Is the non-linearity simply an inherent part of th …
Non-linear transformation of contrast-modulated patterns would give rise to a component (a distortion product) that varies on …
Direction-of-motion discrimination with complex patterns: further observations.
Henning GB, Derrington AM. Henning GB, et al. Among authors: derrington am. J Opt Soc Am A. 1988 Oct;5(10):1759-66. doi: 10.1364/josaa.5.001759. J Opt Soc Am A. 1988. PMID: 3204439
Moving one component of a stimulus comprising two sinusoidal gratings of the same orientation sometimes results in mistaken judgments of the direction of motion. ...The illusory, or backward, motion appears whether the movement producing it occurs smoothly or as a d …
Moving one component of a stimulus comprising two sinusoidal gratings of the same orientation sometimes results in mistaken judgments …
Errors in direction-of-motion discrimination with complex stimuli.
Derrington AM, Henning GB. Derrington AM, et al. Vision Res. 1987;27(1):61-75. doi: 10.1016/0042-6989(87)90143-x. Vision Res. 1987. PMID: 3617547
The direction of apparent motion in a complex pattern comprising a static 1-cycle/degree (c/deg) grating and a moving 3-c/deg grating changes with stimulus duration. At durations longer than about 150 msec, motion is seen almost veridically; the motion of the …
The direction of apparent motion in a complex pattern comprising a static 1-cycle/degree (c/deg) grating and a moving 3 …
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