Parkinson's disease delays predictable visual cue processing without affecting complex and unpredictable visual cue processing in postural control.

摘要: Abstract This study examined the influence of visual information different complexities and predictability on body sway individuals with Parkinson's disease (PD) during upright stance. Twenty-one at initial stages PD (62.1 ± 7.2 years), under dopaminergic medication, 21 controls (62.3 ± 7.1 years) stood inside a moving room, performing 10 trials 60 s. In first trial, room remained motionless. Then, oscillated in an anterior-posterior direction. There were three blocks trials. block, 0.2 Hz (periodic simple condition); second periodic frequencies 0.1, 0.3, 0.5 Hz combined complex third non-periodic (non-periodic condition). Participants not informed about movement. The displacement trunk registered using OPTOTRAK system. Postural was mean amplitude, relationship between used coherence, gain, phase. no group difference when Upon manipulation, displayed larger magnitude condition. Individuals also lagged behind (lower phase values) compared to controls, only remaining measures, there difference. These results suggest that use unpredictable information, similar However, might affect predictable cues processing.