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1- Department of Mechatronics Engineering, School of Engineering-Emerging Technologies

In this study, we tried to analyse changes in walking performance under both single and dual task conditions in people with Parkinson’s Disease (PD) and healthy subjects. To this end, the participants’ trunk acceleration signals were recorded under dual task (counting the stride numbers while walking) and single task (walking without performing any other secondary tasks) conditions. The healthy subjects counted the number of their strides correctly; however, 85% of the patients made glaring errors in counting. Then variances of stride time interval (STI) signals were calculated for each participant. STI signals of patients had greater variance than the healthy subjects in dual-task condition. Separating the two groups in dual task condition is easier. Therefore, we think that the diseased state can be detected in early stages. It is thought that counting is performed independently of walking.  PD affects the function of the basal ganglia that leads to motor timing dysfunction. So, it seems that timing in motor tasks is disrupted while timing in cognitive tasks is not affected. This led us to the conclusion that perhaps inconsistency between the two clocks (motor tasks and cognitive tasks clocks) is the main cause of dual task interference during gait in patients.

Type of Study: Original | Subject: Computational Neuroscience
Received: 2017/06/15 | Accepted: 2018/05/28

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