lithium ion battery pack An ambulatory dyskinesia monitor
Abstract objective new treatment methods can now be used in the treatment of left dopamine-induced motor dysfunction in Parkinson's disease. However, due to the lack of current measurement methods for motor dysfunction, the evaluation of their efficacy is limited. The aim is to develop and verify a portable device capable of objectively measuring movement disorders in normal daily activities. Methods a portable device based on a three-axis acceleration sensor worn on the shoulder and a data recorder capable of recording dopamine-induced motion disorders was developed. The computer program draws the original acceleration and acceleration of more than 0. 5Hz frequency band pair time. Then, the acceleration of different bands can be compared with the original acceleration trajectory, which can identify and eliminate mixed activities such as tremor and walking, which have a characteristic appearance on the trajectory. The effectiveness of the device was assessed by comparing the acceleration in the 1-3Hz band with the established clinical malexercise rating scale for 12 patients and 8 age-matched controls. When subjects wear their monitors, they are recorded by the video to sit there and during the challenging task of movement disorder, including the task of mental activation, eating, drinking, writing, wearing a coat and walking. The movement disorder was scored with the improved Abnormal Involuntary Movement (AIM) and Goetz scales. The clinical score was then compared to the mean accelerated score. Results in all individual tasks, the acceleration of the 1-3Hz band has a good correlation with both scales. The acceleration generated by normal voluntary activity was small compared to inactivity (except for walking, which produced a large acceleration even in the control group ). When walking is excluded, the average acceleration of the remaining time of the time is recorded with the modified AIM (Spelman level (r = 0. 972, p