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Représentations sensori-motrices du geste graphique dans l'espace tridimensionnel

Abstract : The goal of this work was to study the representation of the peri-personnal space in man. This investigation is performed by analysing the arm movement in the three-dimensional space. This movement consisted in the production of drawing movements -ellipses- executed in the three anatomical reference planes: the sagittal, the frontal and the horizontal. By selecting this experimental paradigm, we consider the movement as the expression of a cognitif processus per se: the perceptual motor representation of the three-dimensional space. The drawing movements in the space were recorded by means of the Vicon three-dimensional motion analyser. In the first part of this work, a comparative study has been done about the mental representation of the space and the influence of the visual information. The results of this first part showed that the motor representation of the anatomical reference planes was anisotropic. In the second part, we have studied the influence of the nature of the movement on the production of oriented figure in the space. In this part, the ellipses have been produced by drawing and by pointing. The results confirmed the anisotropy found in the first part of our work. In the third part, the performance of elderly subjects -not suffering of any neurosensorial deficiency- has been studied. The anisotropy in the motor representation of the space, observed for the elderly subjects, can be interpreted as a shrinking of the representation of the peri-personnal space.
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Submitted on : Thursday, March 29, 2018 - 10:58:13 AM
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Mohammad Ghafouri Gharavi. Représentations sensori-motrices du geste graphique dans l'espace tridimensionnel. Neurosciences [q-bio.NC]. Université Henri Poincaré - Nancy 1, 1997. Français. ⟨NNT : 1997NAN10017⟩. ⟨tel-01747376⟩



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