title: [Electromyocartography of the posterior and inferior wall of the abdomen during extension of the torso].
abstract: Analysis of the functions of the muscles of the inferior and posterior regions of the trunk was carried out by electromyocartography for the basic movements of extension of the trunk in ventral decubitus. For a given subject, the results varied little with time. By contrast, the results were substantially the same from subject to subject in the case of only one movement : extension of the caudal portion of the trunk combined with extension of the hips. A functional balance-sheet can be based only on this movement. The sacro-spinalis (without attempting to determine the respective roles of the various bundles) seems to be the only one involved in certain movements of extension of the trunk: Its action is at a maximum, highly variable, when the extension involves both the caudal and the cranial portions of the trunk; It is considerable in the extension of the caudal portion alone, and Moderate in the extension of the cranial portion alone.
mesh_terms: D000009:Abdominal Muscles / Q000502:physiology*; D001415:Back; D004576:Electromyography / Q000379:methods*; D006801:Humans; D009132:Muscles / Q000502:physiology*; D011187:Posture
vernacular_title: Electromyocartographie de la paroi postérieure et inférieure de l'abdomen lors de l'extension du tronc