Galvanic vestibular stimulation modifies vection paths in healthy subjects
| Autor: | Claudine Teyssèdre, Jean-Claude Lepecq, Patrice Tran Ba Huy, Sophie Mertz-Josse, Pierre-Paul Vidal, Catherine de Waele, Pierre-Marie Baudonnière |
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| Rok vydání: | 2006 |
| Předmět: |
Adult
Male medicine.medical_specialty Visual perception Time Factors Adolescent Physiology Photic Stimulation Motion Perception Audiology 050105 experimental psychology Developmental psychology 03 medical and health sciences 0302 clinical medicine Sensory threshold medicine Humans 0501 psychology and cognitive sciences Motion perception Galvanic vestibular stimulation Vestibular system General Neuroscience 05 social sciences Healthy subjects Dose-Response Relationship Radiation Reflex Vestibulo-Ocular Electric Stimulation Sensory Thresholds Visual Perception Female Vestibule Labyrinth Psychology Binaural recording 030217 neurology & neurosurgery |
| Zdroj: | Journal of neurophysiology. 95(5) |
| ISSN: | 0022-3077 |
| Popis: | The present study aimed at determining whether vestibular inputs contribute to the perception of the direction of self-motion. This question was approached by investigating the effects of binaural bipolar galvanic vestibular stimulation (GVS) on visually induced self-motion (i.e., vection) in healthy subjects. Stationary seated subjects were submitted to optokinetic stimulation inducing either forward or upward linear vection. While perceiving vection, they were administered trapezoidal GVS of different intensities and ramp durations. Subjects indicated the shape and direction of their perceived self-motion path throughout the experiment by a joystick, and after each trial by the manipulation of a 3D mannequin. Results show that: 1) GVS induced alterations of the path of vection; 2) these alterations occurred more often after GVS onset than after GVS offset; 3) the occurrence of vection path alterations after GVS onset depended on the intensity of GVS but not on the steepness of the GVS variation; 4) the vection path deviated laterally according to either an oblique or a curved path; and 5) the vection path deviated toward the cathode side after GVS onset. It is the first time that vestibular information, already known to contribute to the induction of vection, is shown to modify self-motion perception during the course of vection. |
| Databáze: | OpenAIRE |
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