[Principles for the functional assessment of the hand]

In the first part, the authors define the parameters needed for a functional evaluation of the hand. Geometric data are analysed in detail and an equi-angular curve used as a model of digital flexion. Mechanical analysis of the thumb using the same method produces a novel evaluation method for thumb movements. Lastly, the authors consider sensibility evaluation problems and the difficulties of obtaining objective data are emphasized. In the second part, the authors stress the necessity of a physiological and global approach and suggest a global evaluation based on elementary patterns of prehension.