Direction and distance deficits in path integration after unilateral vestibular loss depend on task complexity.

摘要: The effects of peripheral vestibular disorders on the direction and distance components internal spatial representation were investigated. ability Meniere's patients to perform path integration was assessed in different situations aimed at differentiating level processing (simple versus complex tasks), available sensory cues (proprioceptive, vestibular, or visual conditions), side (towards healthy lesioned side). After exploring two legs a triangle, participants required either reproduce exploration path, follow reverse take shortcut starting point (triangle completion). Patients' performances recorded before unilateral neurotomy (UVN) during time-course recovery (1 week 1 month) compared those matched control subjects tested similar time intervals. Both angular linear trajectory impaired for controls. However, deficits restricted tasks, which higher processing. Most maximal after UVN, some remained up first post-operative month. Spatial differentially according cues: absent active locomotor blindfolded condition, appeared conditions involving information, when alone available. Finally, concerning loss led global impairment representation, yet asymmetrical observed UVN. On whole, results suggest that environment experienced by is UVN constructed, especially tasks requiring high levels