In vivo muscular force analysis during the isometric flexion on a monkey's elbow.
An experimental method has been developed to analyse muscular forces and torques in vivo during isometric flexion of the elbow in small monkeys (Macaca fascicularis). A mini-transducer was built with a view to measure forces in situ, without cutting tendons. The positions of tendon insertions were measured on anatomical parts, then integrated in a series of calculations aiming of deducing the lever arms of forces to be included in a torque equilibrium relationship. Muscle activity of the three main flexors was measured for five angles of isometric flexion between 70 degrees and 110 degrees, 0 degrees corresponding to the full extended forearm. The analysed signals were selected using physiological and biomechanical criteria. Then, results corresponding to force participation, and torque participations, were worked out; they are presented and discussed in the present paper.
Landjerit
B
B
Laboratoire de Biomécanique, E.N.S.A.M., Paris, France.
Maton
B
B
Peres
G
G
D000818:Animals; D001696:Biomechanical Phenomena; D004551:Elbow Joint / Q000502:physiology*; D004576:Electromyography; D007537:Isometric Contraction; D008252:Macaca fascicularis; D009119:Muscle Contraction; D009132:Muscles / Q000502:physiology*; D019736:Prostheses and Implants; D014159:Transducers