Bimanual coordination deficits with Parkinson's disease: the influence of movement speed and external cueing.

摘要: Continuous coordinated movement of the upper limbs performed at different frequencies, and with external timing conditions, was examined in individuals Parkinson's disease (PD) healthy, age- gender-matched controls. Participants symmetric in-phase movements toward away from midline body, isodirectional anti-phase one three metronome speeds (0.75, 1.25, 1.75 Hz), two auditory cueing conditions (cue present, cue absent). Measures relative phase accuracy (absolute mean error) stability (standard deviation) revealed that PD as well controls, while were greater error variability. The adverse effects on task also reflected by freezing (8.1% trials) hypometric deficits (5.1% during movement. None these PD-related impairments occurred trials. overall or coordination not improved presence pacing cues, suggesting although execution may be dramatically influenced attention, does necessarily improve performance.