[Finger extension. II. Materials and methods].

The study of the extensor apparatus through different methods concerns 200 fingers, the most of fresh cadavers. The dissection through direct observation or with surgical microscope of the dorsal aponeurosis of 30 fingers has been completed by an histological study of 10 fingers. The mechanic properties of each dorsal aponeurotic structure has been tested by extensometry on 12 fingers. The functional study of the role and of the transmission of the different motor components concerns 128 fingers. It has been completed by experimental sections of each aponeurotic structure concerning 20 fingers.