Muscle fibers can broadly be divided into 3 muscles types: skeletal, cardiac, and smooth muscle. This summary discusses the basic anatomy of skeletal muscle, key features of skeletal muscle histology and physiology, and important presentations of muscular disease.
Most of the skeletal muscular system is arranged into groups of agonists and antagonist muscles that work in concert to provide efficient and controlled motion. This is achieved through the complex interaction of the musculoskeletal system with the pyramidal, extrapyramidal, and sensory components of the nervous system. This article mainly focuses on the end organ of this complex interaction, the muscle fiber (myofiber). The different types of myofibers and their functional responsibilities are also discussed.