| Summary: | 碩士 === 中山醫學大學 === 物理治療學系碩士班 === 103 === BACKGROUND AND OBJECTIVE: Previous studies found that cognition is one of he factors involved in postural control. Dual task method is used to assess the influence of cognitive on postural control, and use the dual task cost to represent it. In the past, previous studies found that when the difficulty of the dual task increased, the dual task cost increased in healthy elderly. For this study, we want to know the relationships between the cognitive, walking function and the dual task cost in healthy middle-age and older audlts. Methods: In our study, we assessed 1. cognitive function: MMSE、Digit Span Test、Trail Making Test and Stroop Color Word Test, 2. walking function: 5-M walking test and Timed up and go test in 29 healthy middle-age and older audlts(aged 63.4±9.6 years). Pearson’s correlation coefficients were used to assess the outcomes(cognitive, walking function and the dual task cost). Explore change the dual task performance in healthy middle-age and older audlts stroke patients. Paired sample T test were used to assess the differences. Results: The Pearson’s correlation coefficients analysis showed that speed and length of digit span test had moderate negative correlation(PCC = -0.40, P <0.05), and digit span test positive T scores had moderate negative correlation(PCC = -0.41, P <0.05). Double support duration and Stroop color-word test interference T scores had moderate negative correlation (PCC = -0.50, P <0.05), and the longest the Stroop color-word test color-word test had mild negative correlation (PCC = -0.39, P = 0.04), The dual task cost of double support duration and trail making test part B of seconds had moderate positive correlation(PCC = 0.40, P = 0.04), other non-correlation. Comparing the performance of subtraction task in single task and standing balance task had no significant(P =0.71-0.87), Comparing the performance of subtraction task in standing balance task and walking task had no significant(P = 0.06-0.16), but the dual task cost of standing balance tasks (-6.4 ± 22.9%) and walking balance tasks (71.6 ± 15.8%) had significant (P=0.05). Comparing low/high-demand subtraction task, there are differences in cadence (P = 0.01),but speed (P = 0.49), and double support duration( P = 0.30) had no differences. Conclusion: Between attention, executive function and gait parameters had low to moderate correlation.The difficulty of balancing task increased will affect the performance of the subtraction task and the dual task cost, the difficulty of cognitive task increased will cause the dual task cost of gait, and cadence had variance.Clinical significance: To understand and compare the relationships between the gait parameters and cognitive function. To learn the changes of cogntion, gait and the dual task cost in healthy middle-age and older audlts. Keywords: healthy middle-age and older audlts, cognition, dual task cost, correlation.
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