Skeletal muscle cell (commonly termed skeletal muscle fiber or myofiber) (None widely standardized; commonly "MF" (myofiber) or "SMF" (skeletal muscle fiber) in literature)

A skeletal muscle cell, or muscle fiber, is a long, cylindrical, multinucleated cell that constitutes the main functional unit of skeletal muscle tissue. Muscle fibers are organized into bundles (fasicles) and are specialized for rapid, forceful, and voluntary contractions[3][5][6]. The principal structural unit within each cell is the sarcomere, composed of complex protein filaments (such as actin, myosin, titin, and nebulin) that coordinate contraction in response to action potentials and calcium signaling. These cells are syncytial, formed from the fusion of myoblasts during development, and are supported by connective tissue sheaths (endomysium, perimysium, epimysium)[6][7]. Skeletal muscle cells have a pivotal role in locomotion, metabolism, and disease, but are not themselves molecular targets for drug intervention; rather, many therapeutic strategies focus on processes or structures within these cells, such as membrane ion channels, receptors, or contractile proteins[1][5][6].

Other names

Muscle fiberMyofiberSkeletal myocyte