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Long lasting egocentric disorientation induced by normal sensori-motor spatial interaction

Dupierrix, Eve ; Gresty, Michael ; Ohlmann, Théophile ; Chokron, Sylvie Linden, Rafael

PloS one, 2009-02, Vol.4 (2), p.e4465-e4465 [Periódico revisado por pares]

United States: Public Library of Science

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Título:
Long lasting egocentric disorientation induced by normal sensori-motor spatial interaction
Autor: Dupierrix, Eve ; Gresty, Michael ; Ohlmann, Théophile ; Chokron, Sylvie
Linden, Rafael
Assuntos: Adolescent ; Adult ; Adults ; Algebra ; Anatomy ; Axes (reference lines) ; Bias ; Central nervous system ; Cognition & reasoning ; Confusion ; Disorientation ; Distortion ; Environment ; Female ; Handedness ; Humanities and Social Sciences ; Humans ; Influence ; Lesions ; Life Sciences ; Neurons and Cognition ; Neuropsychology ; Neuroscience/Cognitive Neuroscience ; Neuroscience/Experimental Psychology ; Neuroscience/Motor Systems ; Neuroscience/Sensory Systems ; Organizational aspects ; Orientation ; Orientation - physiology ; Otology ; Perception ; Perceptions ; Posture ; Psychology ; Psychomotor Performance ; Psychomotor Performance - physiology ; Reading ; Sensorimotor integration ; Space Perception ; Space Perception - physiology ; Spatial Behavior ; Spatial Behavior - physiology ; Spatial discrimination ; Transcranial magnetic stimulation ; Young Adult
É parte de: PloS one, 2009-02, Vol.4 (2), p.e4465-e4465
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
PMCID: PMC2636864
Conceived and designed the experiments: ED TO SC. Performed the experiments: ED. Analyzed the data: ED. Contributed reagents/materials/analysis tools: ED. Wrote the paper: ED MAG TO SC.
Descrição: Perception of the cardinal directions of the body, right-left, up-down, ahead-behind, which appears so absolute and fundamental to the organisation of behaviour can in fact, be modified. Perhaps unsurprisingly, it has been shown that prolonged distorted perception of the orientation of body axes can be a consequence of disordered sensori-motor signals, including long-term prismatic adaptation and lesions of the central nervous system. We report the novel and surprising finding that a long-lasting distortion of perception of personal space can also be induced by an ecological pointing task without the artifice of distorting normal sensori-motor relationships. Twelve right-handed healthy adults performed the task of pointing with their arms, without vision, to indicate their subjective 'straight ahead', a task often used to assess the Egocentric Reference. This was performed before, immediately, and one day after a second task intended to 'modulate' perception of spatial direction. The 'modulating' task lasted 5 minutes and consisted of asking participants to point with the right finger to targets that appeared only in one (right or left) half of a computer screen. Estimates of the 'straight-ahead' during pre-test were accurate (inferior to 0.3 degrees deviation). Significantly, up to one day after performing the modulating task, the subjective 'straight-ahead' was deviated (by approximately 3.2 degrees) to the same side to which subjects had pointed to targets. These results reveal that the perception of directional axes for behaviour is readily influenced by interactions with the environment that involve no artificial distortion of normal sensori-motor-spatial relationships and does not necessarily conform to the cardinal directions as defined by the anatomy of orthostatic posture. We thus suggest that perceived space is a dynamic construction directly dependent upon our past experience about the direction and/or the localisation of our sensori-motor spatial interaction with environment.
Editor: United States: Public Library of Science
Idioma: Inglês

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Long lasting egocentric disorientation induced by normal sensori-motor spatial interaction

Dupierrix, Eve ; Gresty, Michael ; Ohlmann, Théophile ; Chokron, Sylvie Linden, Rafael

United States: Public Library of Science

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