Muscle RigidityNeuroleptic Malignant SyndromeAscarisMasseter MuscleSuccinylcholineMalignant HyperthermiaMusclesAlfentanilMuscle, SkeletalFentanylCaenorhabditis elegansCaenorhabditis elegans ProteinsHalothaneMuscle ProteinsMuscle, SmoothMuscle Fibers, SkeletalMuscle, Smooth, VascularMuscle Contraction