Muscle crossbridge action in excitation and relaxation.
Pulse-propagation measurements on a muscle stimulated into tetanus show that the stiffness develops earlier and starts later than the tension. It is concluded that the myosin heads which moves towards the actin filaments during excitation become mechanically attached to them.
D000818:Animals; D002024:Bufo marinus; D066298:In Vitro Techniques; D008954:Models, Biological; D009119:Muscle Contraction; D009126:Muscle Relaxation; D009132:Muscles / Q000502:physiology*