Programa de Pós-Graduação em Ciências do Movimento Humano - PPGCMH/ICS
URI Permanente desta comunidadehttps://repositorio.ufpa.br/handle/2011/15816
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Navegando Programa de Pós-Graduação em Ciências do Movimento Humano - PPGCMH/ICS por Orientadores "SAUNIER, Ghislain"
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Item Acesso aberto (Open Access) A predição de uma ação transitiva é modulada pela valência emocional do objeto(Universidade Federal do Pará, 2021-06-02) AZEVEDO, Priscila da Silva; CAMPOS, Anaelli Aparecida Nogueira; http://lattes.cnpq.br/1380793960958329; SAUNIER, Ghislain; http://lattes.cnpq.br/6254015055212071; https://orcid.org/0000-0002-0882-7788Recent experimental evidences demonstrate that the action observation and action execution directed to objects (i.e., transitive action) shared similar motor areas. This action-perception network is involved in our ability to predict the sensory consequences of actions performed by others. Thus, the main objective of the present work was to evaluate the effect of an object's emotional valence on to the action prediction process. For this, 38 undergraduate students were recruited to watch reach-to-grasp videos directed of pleasant, unpleasant or neutral objects on a computer screen. Two visual conditions were included: occlusion (a black rectangle occluded the last 50% of the movement) and full vision. In total, 90 repetitions were performed (2 visual conditions x 3 valences x 15 repetitions). The experiment always started with the occlusion block. The participant's task consisted in predict the time-to-contact (TTC) between the hand and the object by pressing the space bar on the keyboard. Prediction errors were calculated based on the temporal difference (ms) between the participants' prediction of TTC and the contact times of our videos. An ANOVA for repeated measures (2 visual conditions x 3 valences) was used to compare the prediction errors. The Tukey post-hoc test was used to compare the significant effects (p <0.05). Our results suggest that the prediction of action is modulated by the emotional valence of the object. We found a valence effect with a greater temporal precision for AGR and NEU objects when compared to DES. There was no visual effect on action prediction. Finally, we observed that the visual condition only modulated the prediction of the action directed to AGR and NEU objects. To our knowledge, this is the first behavioral demonstration that the emotional valence of objects interferes within the action prediction process. These results may contribute in the future to the development of complementary protocols to traditional motor rehabilitation.Item Acesso aberto (Open Access) Representações das ações em mulheres mas mastectomizadas: exemplo de uma tarefa de rotação mental(Universidade Federal do Pará, 2023-03-06) ALMEIDA, Larissa Nazaré Queiroz de Araújo; SAUNIER, Ghislain; http://lattes.cnpq.br/6254015055212071; https://orcid.org/0000-0002-0882-7788Breast cancer is an aggressive and mutilating disease responsible for the highest number of deaths among women in Brazil. The mastectomy postoperative period leads to limitations of upper limb movement, particularly of ipsilateral side to the affected breast. This research aimed to investigate whether motor representations of upper limb are modulated after mastectomy surgery. For this, a hand laterality judgment experiment was carried out, in which the participant identified whether the images projected on a computer screen represented a right or left hand. Respecting the inclusion criteria, 17 women participated in the study, 9 with mastectomy with some limitations of upper limb movements, ipsilateral to the affected breast and 8 healthy women who underwent the same experiment, at the Laboratory for the Evaluation and Rehabilitation of Cardiovascular Dysfunctions, Oncology and Respiratory - LACOR (UFPA). The results showed a lower accuracy for mastectomized women when assessing the laterality of the ipsilateral hand to the affected breast compared to the control group, particularly for restricted biomechanically postures (i.e., palmar view and 90° lateral orientation). Such results suggest changes in the motor representations of the upper limb ipsilateral to the affected breast.