References of "Journal of Neurophysiology"
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See detailInfluence of near threshold visual distractors on perceptual detection and reaching movements.
Deplancke, A.; Madelain, L.; Chauvin, A. et al

in Journal of neurophysiology (2010), 104(4), 2249-56

Providing evidence against a dissociation between conscious vision for perception and unconscious vision for action, recent studies have suggested that perceptual and motor decisions are based on a unique ... [more ▼]

Providing evidence against a dissociation between conscious vision for perception and unconscious vision for action, recent studies have suggested that perceptual and motor decisions are based on a unique signal but distinct decisional thresholds. The aim of the present study was to provide a direct test of this assumption in a perceptual-motor dual task involving arm movements. In 300 trials, 10 participants performed speeded pointing movements toward a highly visible target located at 10° from the fixation point and ± 45° from the body midline. The target was preceded by one or two close to threshold distractor(s) (80 ms stimulus onset asynchrony) presented ± 30° according to the target location. After each pointing movement, participants judged whether the distractor was present or not on either side of the target. Results showed a robust reaction time facilitation effect and a deviation toward the distractor when the distractor was both present and consciously perceived (Hit). A small reaction time facilitation was also observed when two distractors were physically present but undetected (double-miss)--this facilitation being highly correlated with the physical contrast of the distractors. These results are compatible with the theory proposing that perceptual and motor decisions are based on a common signal but emerge from a contrast dependent fixed threshold for motor responses and a variable context dependent criterion for perceptual responses. This paper thus extends to arm movement control previous findings related to oculomotor control. [less ▲]

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See detailComparison of perceptual and motor decisions via confidence judgments and saccade curvature.
Cardoso-Leite, Pedro UL; Gorea, Andrei

in Journal of neurophysiology (2009), 101(6), 2822-36

This study investigated the effects on perceptual and motor decisions of low-contrast distractors, presented 5 degrees on the left and/or the right of the fixation point. Perceptual decisions were ... [more ▼]

This study investigated the effects on perceptual and motor decisions of low-contrast distractors, presented 5 degrees on the left and/or the right of the fixation point. Perceptual decisions were assessed with a yes/no (distractor) detection task. Motor decisions were assessed via these distractors' effects on the trajectory of an impending saccade to a distinct imperative stimulus, presented 10 degrees above fixation 50 ms after the distractor(s). Saccade curvature models postulate that distractors activate loci on a motor map that evoke reflexive saccades and that the distractor evoked activity is inhibited to prevent reflexive orienting to the cost of causing a saccade curvature away from the distractor. Depending on whether or not each of these processes depends on perceptual detection, one can predict the relationships between saccades' curvature and perceptual responses (classified as correct rejections, misses, false alarms, and hits). The results show that saccades curve away from distractors only when observers report them to be present. Furthermore, saccade deviation is correlated (on a trial-by-trial basis) with the inferred internal response associated with the perceptual report: the stronger the distractor-evoked perceptual response, the more saccades deviate away from the distractor. Also in contrast with a supersensitive motor system, perceptual sensitivity is systematically higher than the motor sensitivity derived from the distributions of the saccades' curvatures. Finally, when both distractors are present (and straight saccades are expected), the sign of saccades' curvature is correlated with observers' perceptual bias/criterion. Overall the results point to a strong perceptual-motor association. [less ▲]

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See detailResponses of nociceptive SI neurons in monkeys and pain sensation in humans elicited by noxious thermal stimulation: effect of interstimulus interval
Chudler, Eric H; Anton, Fernand UL; Dubner, Ronald et al

in Journal of Neurophysiology (1990), 63(3), 559-569

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See detailThe detection and perveived intensity of noxious thermal stimuli in monkey and human
Kenshalo, Dan R; Anton, Fernand UL; Dubner, Ronald

in Journal of Neurophysiology (1989), 62(2), 429-436

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