Relationship between light diffraction intensity and tension development in frog skeletal muscle.
Laser diffraction intensity decrease in active muscles precedes tension development at sarcomere lengths below 2.76 microns, but not at greater lengths. This suggests that the time lag is caused by random sarcomere shortenings inside each myofibril.
D000818:Animals; D004558:Electric Stimulation; D007834:Lasers; D009119:Muscle Contraction; D009132:Muscles / Q000502:physiology / Q000648:ultrastructure*; D009210:Myofibrils / Q000648:ultrastructure; D011892:Rana catesbeiana; D011898:Ranidae; D012542:Scattering, Radiation