The mobility of digits depends on the combined function of joints and muscles. In order to quantify the complex sequence of motion, different methods have been described. Object of the study is the establishing of a standard for measurement and quantification of complete digital mobility. Based on a study of Pieper et. al. 1979 concerned with graphic recording of finger mobility in digital space of action, a mathematical model has been determined, which enables comprehensive measurement of finger mobility and quantification by absolute figures. Thus, different fingers can be accurately compared as to their range of action and individual mobility. Furthermore, this method takes into account joint function in assessing digital mobility as well as the role of individual finger mobility for the composite function of the hand. Here we present a computer program for easy implementation of our formula for quantitative measurement of the digital and hand mobility. Common clinical measurement data are used as input to obtain graphic, animated display of actual finger mobility, to quantify the results mathematically and to provide direct percentage comparison between mobility, normal and impaired. The computer program is being demonstrated in design and application. Advantages of this approach are being outlined for clinical use, compared to well known methods and shown in case reports.
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The mobility of digits depends on the combined function of joints and muscles. In order to quantify the complex sequence of motion, different methods have been described. Object of the study is the establishing of a standard for measurement and quantification of complete digital mobility. Based on a study of Pieper et. al. 1979 concerned with graphic recording of finger mobility in digital space of action, a mathematical model has been determined, which enables comprehensive measurement of finge...
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