Muscle surface deformation in the stretched sensory zone of the frog muscle spindle.
D000818:Animals; D002462:Cell Membrane / Q000648:ultrastructure; D009119:Muscle Contraction; D009470:Muscle Spindles / Q000648:ultrastructure*; D011894:Rana pipiens; D012519:Sarcoplasmic Reticulum / Q000648:ultrastructure