title: [Extension of the fingers. IV. Morphologic and structural study].
abstract: The putting in tension of the dorsal aponeurosis of the digits induces its retraction and the nearness of its insertions on the basis of the 3 phalanges. It depends on the extensor digitorum, interosseous and lumbrical muscles. The aponeurosis is not a single driving belt, but set off in itself 3 types of reaction: 1) The gliding on the sides of the pyramid, which constitute the proximal epiphyses of the phalanges. It suppresses the central dorsal-ward tensions. 2) The displacement of the axes of insertion and rotation of retinacular ligaments inducing collateral volar-ward tractions. 3) The modifications of the way of the structures of transmission: at one time the lengthening of the way is induced by the interactions of the fibers; at other times a shortening is suppressed by the extension of the close proximal joint. Analysis of the different fibrous and fascicular interactions and translations.
authors.affiliation: Laboratoire d'Anatomie de la Pitié-Salpétrière, Paris.
authors.forename: J N
authors.initials: JN
authors.lastname: Kuhlmann
authors.forename: H
authors.initials: H
authors.lastname: Guerin-Surville
authors.forename: S
authors.initials: S
authors.lastname: Baux
mesh_terms: D001696:Biomechanical Phenomena; D001842:Bone and Bones / Q000033:anatomy & histology; D005384:Finger Joint / Q000033:anatomy & histology; D005385:Fingers / Q000033:anatomy & histology* / Q000502:physiology; D006801:Humans; D008023:Ligaments, Articular / Q000033:anatomy & histology; D009132:Muscles / Q000033:anatomy & histology* / Q000502:physiology; D012212:Rheology; D013710:Tendons / Q000033:anatomy & histology
vernacular_title: L'extension des doigts. IV. Anatomie fonctionnelle.