par Enoka, Roger R.M.;Duchateau, Jacques
Référence Exercise and Muscle Physiology, Elsevier, page (129-157)
Publication Publié, 2018-11
Partie d'ouvrage collectif
Résumé : As the final common pathway from the nervous system to muscle, the motor unit transmits an activation signal and transforms it into contractile activity. By varying the number of motor units that are activated for a specific action and the rates at which they discharge action potentials, the nervous system is able to control a range of muscle functions. The contractile properties of muscle comprise its force capacity (strength and power), the rate at which it can develop force (contractile speed), and the duration that it can sustain a specific force (fatigability). We discuss the key neuromuscular determinants for each of these attributes, how they can be measured, and how they can be modified by physical activity. The adaptations selectively involve structures and processes that extend from the cerebral cortex to the connective tissues involved in force transmission from the muscle fibers to the skeleton.