title: [Optical property changes during activity of myocardial trabeculae and skeletal muscle of Rana esculenta].
abstract: The contractile activity,measured on a small portion of myocardial trabeculae or skeletal muscle, is accompanied by optical changes, analyzed using a signal averaging technique. Scattering changes correspond mainly to structural modifications (volume); absorption changes are attributed to early metabolic events while birefringence changes are related to variations in mechanical tension.
mesh_terms: D000818:Animals; D001718:Birefringence; D002942:Circular Dichroism; D004558:Electric Stimulation; D006321:Heart / Q000502:physiology*; D008027:Light; D009119:Muscle Contraction; D009132:Muscles / Q000502:physiology*; D009200:Myocardial Contraction; D011893:Rana esculenta; D012542:Scattering, Radiation; D013053:Spectrophotometry
vernacular_title: Propriétés optiques étudiées au cours de l'activité des trabécules cardiaques et des fibres musculaires squelettiques isolées chez Rana esculenta