Visual processing of moving and static self body-parts

Frassinetti, Francesca; Pavani, Francesco; Zamagni, Elisa; Fusaroli, Giulia; Vescovi, Massimo; Benassi, Mariagrazia; Avanzi, Stefano; Farnè, Alessandro

doi:10.1016/j.neuropsychologia.2009.03.012

Cited by 40 publications

(41 citation statements)

References 25 publications

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“…Indeed, while the implicit self-advantage (Frassinetti 2008(Frassinetti , 2009(Frassinetti , 2010 was conWrmed in Experiment 1, a better performance for self body-parts, in comparison with others', was not observed whenever participants were asked to explicitly recognize their own body-eVectors, in Experiment 2 and Experiment 3.…”

Section: Discussionmentioning

confidence: 79%

“…If our hypothesis is true, the body self-advantage should be particularly evident when participants are performing an implicit self-body recognition task, as in the previous studies (Frassinetti et al 2008(Frassinetti et al , 2009(Frassinetti et al , 2010, whereas it should not necessarily arise when the same participants are explicitly required to recognize their own body, since the performance in this second task would strictly depend on the amount of available visual information.…”

Section: Introductionmentioning

confidence: 70%

“…This hypothesis rested on various empirical evidence. For instance, previous Wndings have shown that the self-advantage emerging in an implicit task is stronger for dynamic than for static stimuli (Frassinetti et al 2009). Indeed, participants performed better with dynamic than with static images depicting self body-parts, even if the dynamic condition was more diYcult than the static one.…”

Section: Discussionmentioning

confidence: 99%

“…When performing a visual matching task using gray-scale pictures, participants show the so-called self-advantage, that is, a better performance with self rather than others' body-parts (Frassinetti et al 2008(Frassinetti et al , 2009(Frassinetti et al , 2010. Our hypothesis is that the implicit self-advantage revealed by the visual matching task is not merely due to visual perceptual facilitation, but may be due to a combination of visual, somatosensory, proprioceptive, and motor information.…”

Section: Introductionmentioning

confidence: 89%

“…Indeed, when an explicit discrimination between self and others' body-parts is not required, as for the visual matching task by Frassinetti et al (2008Frassinetti et al ( , 2009Frassinetti et al ( , 2010, the presence of a picture depicting participant's body improves participants' performance, suggesting that a sort of self-body recognition must implicitly occur. In this speciWc case, participants have to look for visual information to match details between pictures, rather than to recognize self-images.…”

Section: Introductionmentioning

confidence: 99%

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Bodily self: an implicit knowledge of what is explicitly unknown

et al. 2011

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We tested the hypothesis that the body selfadvantage, i.e., the facilitation in discriminating self versus other people's body-eVectors, is the expression of an implicit and body-speciWc knowledge, based mainly on the sensorimotor representation of one's own body-eVectors. Alternatively, the body self-advantage could rely on visual recognition of pictorial cues. According to the Wrst hypothesis, using gray-scale pictures of body-parts, the body selfadvantage should emerge when self-body recognition is implicitly required and should be speciWc for body-eVectors and not for inanimate-objects. In contrast, if the self-advantage is due to a mere visual-perceptual facilitation, it should be independent of the implicit or explicit request (and could be extended also to objects). To disentangle these hypotheses, healthy participants were implicitly or explicitly required to recognize either their own body-eVectors or inanimate-objects. Participants were more accurate in the implicit task with self rather than with others' bodyeVectors. In contrast, the self-advantage was not found when an explicit recognition of one's own body-eVectors was required, suggesting that the body self-advantage relies upon a sensorimotor, rather than a mere visual representation of one's own body. Moreover, the absence of both self/ other and implicit/explicit eVects, when processing inanimate-objects, underlines the diVerences between the body and other objects.

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Section: Discussionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 70%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Bodily self: an implicit knowledge of what is explicitly unknown

et al. 2011

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Seeing your own or someone else's hand moving in accordance with your action: The neural interaction of agency and hand identity

Uhlmann

Pazen

Kemenade

et al. 2020

Human Brain Mapping

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Forward models can predict sensory consequences of self-action, which is reflected by less neural processing for actively than passively generated sensory inputs (BOLD suppression effect). However, it remains open whether forward models take the identity of a moving body part into account when predicting the sensory consequences of an action. In the current study, fMRI was used to investigate the neural correlates of active and passive hand movements during which participants saw either an on-line display of their own hand or someone else's hand moving in accordance with their movement. Participants had to detect delays (0-417 ms) between their movement and the displays. Analyses revealed reduced activation in sensory areas and higher delay detection thresholds for active versus passive movements. Furthermore, there was increased activation in the hippocampus, the amygdala, and the middle temporal gyrus when someone else's hand was seen. Most importantly, in posterior parietal (angular gyrus and precuneus), frontal (middle, superior, and medial frontal gyrus), and temporal (middle temporal gyrus) regions, suppression for actively versus passively generated feedback was stronger when participants were viewing their own compared to someone else's hand. Our results suggest that forward models can take hand identity into account when predicting sensory action consequences. K E Y W O R D Sagency, fMRI, forward model, hand identity, hand movement, prediction, self-other

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Bodily self‐recognition in patients with pathological embodiment

Candini

Fossataro

Pia

et al. 2022

J of Neuroscience Research

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The ability to discriminate between one's own and others' body parts can be lost after brain damage, as in patients who misidentify someone else's hand as their own (pathological embodiment). Surprisingly, these patients do not use visual information to discriminate between the own and the alien hand. We asked whether this impaired visual discrimination emerges only in the ecological evaluation when the pathological embodiment is triggered by the physical alien hand (the examiner's one) or whether it emerges also when hand images are displayed on a screen. Forty right brain‐damaged patients, with (E+ = 20) and without (E− = 20) pathological embodiment, and 24 healthy controls underwent two tasks in which stimuli depicting self and other hands was adopted. In the Implicit task, where participants judged which of two images matched a central target, the self‐advantage (better performance with Self than Other stimuli) selectively emerges in controls, but not in patients. Moreover, E+ patients show a significantly lower performance with respect to both controls and E− patients, whereas E− patients were comparable to controls. In the Explicit task, where participants judged which stimuli belonged to themselves, both E− and E+ patients performed worst when compared to controls, but only E+ patients hyper‐attributed others' hand to themselves (i.e., false alarms) as observed during the ecological evaluation. The VLSM revealed that SLF damage was significantly associated with the tendency of committing false alarm errors. We demonstrate that, in E+ patients, the ability to visually recognize the own body is lost, at both implicit and explicit level.

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Visual processing of moving and static self body-parts

Cited by 40 publications

References 25 publications

Bodily self: an implicit knowledge of what is explicitly unknown

Bodily self: an implicit knowledge of what is explicitly unknown

Seeing your own or someone else's hand moving in accordance with your action: The neural interaction of agency and hand identity

Bodily self‐recognition in patients with pathological embodiment

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