Orienting of attention in deafferented patients

Nougier, Vincent; Rossi, Bruna; Bard, Chantal; Fluery, M.; Teasdale, Normand; Cole, Jonathan; Lamarre, Y.

doi:10.1016/0028-3932(94)90154-6

Cited by 5 publications

(6 citation statements)

References 31 publications

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“…Surprisingly, IW performed this task significantly better than the control group. His generally heightened level of visual attention has previously been remarked upon (Nougier, Rossi, Bard, et al 1994). Perhaps, because he has learnt to rely entirely on visual supervision for movement control, visual signals are processed with an increased accuracy.…”

Section: Discussionmentioning

confidence: 71%

Proprioception Contributes to the Sense of Agency during Visual Observation of Hand Movements: Evidence from Temporal Judgments of Action

Balslev

Cole

Miall

2007

Journal of Cognitive Neuroscience

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The ability to recognize visually one's own movement is important for motor control and, through attribution of agency, for social interactions. Agency of actions may be decided by comparisons of visual feedback, efferent signals, and proprioceptive inputs. Because the ability to identify one's own visual feedback from passive movements is decreased relative to active movements, or in some cases is even absent, the role of proprioception in self-recognition has been questioned. Proprioception during passive and active movements may, however, differ, and so to address any role for proprioception in the sense of agency, the active movement condition must be examined. Here we tested a chronically deafferented man (I.W.) and an age-matched group of six healthy controls in a task requiring judgement of the timing of action. Subjects performed finger movements and watched a visual cursor that moved either synchronously or asynchronously with a random delay, and reported whether or not they felt they controlled the cursor. Movement accuracy was matched between groups. In the absence of proprioception, I.W. was less able than the control group to discriminate self- from computer-produced cursor movement based on the timing of movement. In a control visual discrimination task with concurrent similar finger movements but no agency detection, I.W. was unimpaired, suggesting that this effect was task specific. We conclude that proprioception does contribute to the visual identification of ownership during active movements and, thus, to the sense of agency.

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Section: Discussionmentioning

confidence: 71%

Proprioception Contributes to the Sense of Agency during Visual Observation of Hand Movements: Evidence from Temporal Judgments of Action

Balslev

Cole

Miall

2007

Journal of Cognitive Neuroscience

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“…Additionally, he did not show any significant modulation of RTs across the tested conditions (other than the typical slow responses for invalid cue conditions, which we do not report here). We suggest that he was more strategic, top-down, in his approach-and possibly more cautious about the invalid and catch trials-as he was in a previous attentional task (Nougier et al 1994). IW prefers a cautious approach in tasks that he wishes to perform as well as possible (Renault et al 2018).…”

Section: Attentional Bias To Peri-personal Spacementioning

confidence: 85%

“…The fixation cross and the placeholders were pseudorandomly presented near to the hand or at the far edge of the display screen, outside reach distance. This was then followed by one of the two placeholders being replaced by a red outline, acting as a Posner-like attentional cue (Posner 1980;Nougier et al 1994) to shift attention towards the lateral target. After 200 ms, the target appeared, with 70% probability to be on the cued side and 20% probability to be on the opposite side.…”

Section: Protocolmentioning

confidence: 99%

Perception of body shape and size without touch or proprioception: evidence from individuals with congenital and acquired neuropathy

et al. 2021

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The degree to which mental representations of the body can be established and maintained without somatosensory input remains unclear. We contrast two “deafferented” adults, one who acquired large fibre sensory loss as an adult (IW) and another who was born without somatosensation (KS). We compared their responses to those of matched controls in three perceptual tasks: first accuracy of their mental image of their hands (assessed by testing recognition of correct hand length/width ratio in distorted photographs and by locating landmarks on the unseen hand); then accuracy of arm length judgements (assessed by judgement of reaching distance), and finally, we tested for an attentional bias towards peri-personal space (assessed by reaction times to visual target presentation). We hypothesised that IW would demonstrate responses consistent with him accessing conscious knowledge, whereas KS might show evidence of responses dependent on non-conscious mechanisms. In the first two experiments, both participants were able to give consistent responses about hand shape and arm length, but IW displayed a better awareness of hand shape than KS (and controls). KS demonstrated poorer spatial accuracy in reporting hand landmarks than both IW and controls, and appears to have less awareness of her hands. Reach distance was overestimated by both IW and KS, as it was for controls; the precision of their judgements was slightly lower than that of the controls. In the attentional task, IW showed no reaction time differences across conditions in the visual detection task, unlike controls, suggesting that he has no peri-personal bias of attention. In contrast, KS did show target location-dependent modulation of reaction times, when her hands were visible. We suggest that both IW and KS can access a conscious body image, although its accuracy may reflect their different experience of hand action. Acquired sensory loss has deprived IW of any subconscious body awareness, but the congenital absence of somatosensation may have led to its partial replacement by a form of visual proprioception in KS.

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“…In general, RTs for valid trials are faster than the ones for invalid trials and the difference is called the "cuing effect." The studies of Casteillo and Umiltà (1992) and Nougier, et al (1989) showed that athletes had approximately the same RTs as nonathletes on valid trials but had much faster RTs on invalid trials. Moreover, Enns and Richards (1992) found that this difference was larger for more highly trained open-skill athletes (hockey players of two skill levels).…”

Section: Discussionmentioning

confidence: 99%

“…Some studies have assessed the ability to allocate visual attention (McAuliffe, 2004;Casteillo & Umiltà, 1992;Nougier, Ripoll, & Stein, 1989). A recent study exploring visual search strategies in open-skill soccer players found that they were faster than non-athletes in switching attention from local to global focus and more rapid to "zoom-out" the focus of attention (Pesce, Tessitore, Casella, Pirritano, & Capranica, 2007); but no data are available on visuospatial attention anisotropy (i.e., directional non-uniformity) Visuospatial attention can be assessed using the line-length judgment task, a version of Milner's modified Landmark task (Milner, Harvey, Roberts, & Forster, 1993).…”

mentioning

confidence: 99%