The effect of dual-task interference on postural sway and hand flexibility in early Parkinson's disease

• DOI: 10.3760/cma.j.issn.1674-6554.2015.11.013
• Publication Date: 2015-11-20
• Authors: Tuanzhi Chen; Xianbo Zhuang; Yang Xiafeng; Jiang Guisheng; Yifeng Du; Shan Guangzhen
• Keywords: Jerk; Eyes open

Objective To observe the effect of dual-task interference on postural sway and hand flexibility patients with early Parkinson's disease(PD).

Methods Twenty-tree PD twenty-three healthy, sex-and age-matched control subjects were examined. Postural was measured an accelerometer at centre mass lower spine.Two parameters computed from acceleration signals including root mean square acceleration(RMS) jerkiness sway(JERK). Purdue pegboard test, single-task tests test performed respectively to record numbers nails inserted left hand, right both hands within 30 seconds.

Results In usual conditions, no significant differences found between group in eye open closed condition. In condition, showed increase RMS values(eye conditions: (0.156±0.112)m/s2, (0.086±0.026) m/s2; (0.204±0.162)m/s2, (0.095±0.023)m/s2)of acceleration, compared subjects(P<0.01). These reached significance during cognitive task performance dual task. larger JERK values increasing difficulty which also performance(P<0.05). The number pegs s (17.33±4.87)was significantly than that controls(20.77±4.13)(P<0.05).

Conclusion The obviously decrease. balance may deteriorate when their attention is diverted or reduced because attempting perform tasks.

Key words: Parkinson's disease; Postural instability; Dual-task interference; Accelerometer