Ghislain Saunier

Universidade Federal do Pará

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Bianca Callegari

Universidade Federal do Pará

Manuela Brito Duarte

Universidade Federal do Pará

Thierry Pozzo

Université de Bourgogne

Cláudia D. Vargas

Universidade Federal do Rio de Janeiro

Givago da Silva Souza

Universidade Federal do Pará

Gizele Cristina da Silva Almeida

Universidade Federal do Pará

César Ferreira Amorim

Universidade Cidade de São Paulo

France Mourey

Université de Bourgogne

Anaelli Aparecida Nogueira‐Campos

Universidade Federal de Juiz de Fora

Thierry Pozzo

Cognition, Action, and Sensorimotor Plasticity

Cooperative Institutions

Universidade Federal do Pará

Universidade Federal do Rio de Janeiro

Universidade Federal de Juiz de Fora

Université de Bourgogne

Instituto de Saúde

Universidade Cidade de São Paulo

Italian Institute of Technology

Instituto de Biofísica Carlos Chagas Filho

Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro

Cognition, Action, and Sensorimotor Plasticity

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133. Predicting an observed movement after unilateral upper-limb amputation

Clinical Neurophysiology (2008)

Érika C. Rodrigues Ana Paula Fontana Mateus Joffily Ghislain Saunier James M. Kilner

10.1016/j.clinph.2008.04.149

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Citations (1)

Electrophysiological correlates of biological motion permanence in humans

Behavioural Brain Research (2012)

Ghislain Saunier Eduardo F. Martins Elisa C. Dias José M. Oliveira Thierry Pozzo

Biological motion

10.1016/j.bbr.2012.08.038

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Citations (21)

Peer Review #2 of "Anticipatory Postural Adjustments and kinematic arm features when postural stability is manipulated (v0.2)"

Bianca Callegari Ghislain Saunier Manuela Brito Duarte Cristina Gizele Silva Da

Beyond the classical paradigm that presents the Anticipatory Postural Adjustments (APAs) as a manner to create forces that counteract disturbances arising from the moving segment, during a pointing task, there is a controversial discussion about the role APAs to facilitate the movement and perform a task accurately.In addition, arm kinematics features are classically used to infer the content of motor planning for the execution and the control of arm movements.

10.7287/peerj.4309v0.2/reviews/2

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Peer Review #2 of "Anticipatory Postural Adjustments and kinematic arm features when postural stability is manipulated (v0.1)"

Bianca Callegari Ghislain Saunier Manuela Brito Duarte Cristina Gizele Silva Da

10.7287/peerj.4309v0.1/reviews/2

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Grasping affordance judgments depend on the object emotional value

Frontiers in Human Neuroscience (2024)

Matheus Ribeiro Felippin Ivo Lopes Azevedo Ghislain Saunier Les Keniston Anaelli Aparecida Nogueira‐Campos

Introduction The concept of affordance refers to the opportunities for action provided by the environment, often conveyed through visual information. It has been applied to explain visuomotor processing and movement planning. As emotion modulates both visual perception and the motor system, it is reasonable to ask whether emotion can influence affordance judgments. If present, this relationship can have important ontological implications for affordances. Thus, we investigated whether the emotional value of manipulable objects affected the judgment of the appropriate grasping that could be used to interact with them (i.e., their affordance). Methods Volunteers were instructed to use a numerical scale to report their judgment on how an observed object should be grasped. We compared these judgments across emotional categories of objects (pleasant, unpleasant and neutral), while also considering the expected effect of object size. Results We found that unpleasant objects were rated as more appropriately graspable by a precision grip than pleasant and neutral objects. Simultaneously, smaller object size also favored this judgment. This effect was seen in all emotional categories examined in equal magnitude. Discussion Our findings suggest that the emotional value of objects modulates affordance judgments in a way that favors careful manipulation and minimal physical contact with aversive stimuli. Finally, we discuss how this affective aspect of our experience of objects overlaps with what affordances are conceptualized to be, calling for further reexamination of the relationship between affordances and emotions.

Affordance

Value (mathematics)

10.3389/fnhum.2024.1331253

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Biological Motion Coding in the Brain: Analysis of Visually Driven EEG Functional Networks

PLoS ONE (2014)

Daniel Fraiman Ghislain Saunier Eduardo F. Martins Cláudia D. Vargas

Herein, we address the time evolution of brain functional networks computed from electroencephalographic activity driven by visual stimuli. We describe how these functional network signatures change in fast scale when confronted with point-light display stimuli depicting biological motion (BM) as opposed to scrambled motion (SM). Whereas global network measures (average path length, average clustering coefficient, and average betweenness) computed as a function of time did not discriminate between BM and SM, local node properties did. Comparing the network local measures of the BM condition with those of the SM condition, we found higher degree and betweenness values in the left frontal (F7) electrode, as well as a higher clustering coefficient in the right occipital (O2) electrode, for the SM condition. Conversely, for the BM condition, we found higher degree values in central parietal (Pz) electrode and a higher clustering coefficient in the left parietal (P3) electrode. These results are discussed in the context of the brain networks involved in encoding BM versus SM.

Clustering coefficient

10.1371/journal.pone.0084612

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Anticipatory Postural Adjustments in the Frail Older Adults When Postural Stability is Manipulated

Research Square (Research Square) (2020)

Bianca Callegari Alexandre Kubicki Ghislain Saunier Manuela Brito Duarte Gizele Cristina da Silva Almeida

Abstract Background: Anticipatory Postural Adjustments (APAs) are importantly affected by age and may represent restrictions for functional independence. Previous studies have already highlighted some delayed APAs during self-generated rapid arm movements in aged adults, as well as in cases of non-optimal aging, such as in frail older adults. In young (Y) adults, it was also previously demonstrated that changing the postural stability (i.e. seated vs. upright posture) affects the motor planning and APAs. Considering the clinical relevance of these balance tasks in the functional independence in frail older adults (FOA), and the lack of literature about this task, the present study aimed to investigate the impact of these different conditions of postural stability on APAs in FOA. Methods: In this paper, participants executed an arm-pointing task to reach a diode immediately after it turned on, under different conditions of stability (seated with and without feet support and in upright posture). Results: The main finding of this study is that the adopted posture and body stabilization in FOA did not reflect differences in APAs or kinematic features. In addition, they did not present an optimal APA, since postural muscles are recruited simultaneously with the deltoid. Conclusion: Thus, FOA seem to use a single non-optimal motor plan to assist the task performance and counterbalance perturbation forces, in which they present similar APAs and do not modify their kinematics features according to the body stabilization (i.e. less challenging task present greater finger velocity).

Deltoid curve

10.21203/rs.3.rs-107332/v1

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The pleasantness and unpleasantness of an object distinctively drives its grasping prediction: behavioral evidence

Psychological Research (2022)

Ghislain Saunier Priscila da Silva Azevedo Vitoria Labiapari Pinto Anaelli Aparecida Nogueira‐Campos

Emotional valence

10.1007/s00426-022-01765-w

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The Relative Influence of Goal and Kinematics on Corticospinal Excitability Depends on the Information Provided to the Observer

Cerebral Cortex (2014)

Sofía I. Mc Cabe Jorge Ignacio Villalta Ghislain Saunier Scott T. Grafton Valeria Della‐Maggiore

Viewing a person perform an action activates the observer's motor system. Whether this phenomenon reflects the action's kinematics or its final goal remains a matter of debate. One alternative to this apparent controversy is that the relative influence of goal and kinematics depends on the information available to the observer. Here, we addressed this possibility. For this purpose, we measured corticospinal excitability (CSE) while subjects viewed 3 different grasping actions with 2 goals: a large and a small object. Actions were directed to the large object, the small object, or corrected online in which case the goal switched during the movement. We first determined the kinematics and dynamics of the 3 actions during execution. This information was used in 2 other experiments to measure CSE while observers viewed videos of the same actions. CSE was recorded prior to movement onset and at 3 time points during the observed action. To discern between goal and kinematics, information about the goal was manipulated across experiments. We found that the goal influenced CSE only when its identity was known before movement onset. In contrast, a kinematic modulation of CSE was observed whether or not information regarding the goal was provided.

Observer (physics)

Motor Control

10.1093/cercor/bhu029

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Citations (32)

Peer Review #1 of "Anticipatory Postural Adjustments and kinematic arm features when postural stability is manipulated (v0.1)"

Bianca Callegari Ghislain Saunier Manuela Brito Duarte Cristina Gizele Silva Da

10.7287/peerj.4309v0.1/reviews/1

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