Thick filament size changes in contraction of human muscles.
Measurements done on electron micrographs shows that in myofibres with sarcomeres contracted to below 2.1 micron, proportional shortening of the A bands occurs. In muscles from patients with idiopathic scoliosis very short A bands are especially prominent.
D003599:Cytoskeleton / Q000648:ultrastructure; D006801:Humans; D008854:Microscopy, Electron; D009119:Muscle Contraction; D009132:Muscles / Q000648:ultrastructure*; D009210:Myofibrils / Q000648:ultrastructure