Neuromuscular AgentsNeuromuscular Nondepolarizing AgentsPancuroniumVecuronium BromideAtracuriumNeuromuscular Blocking AgentsAndrostanolsSuccinylcholineTubocurarineNeuromuscular Depolarizing AgentsNeostigmineEdrophoniumGallamine TriethiodideIsoquinolinesNeuromuscular JunctionCholinesterasesDimethylphenylpiperazinium IodideNeuromuscular BlockadeThiopentalNitrous OxideNicotinic AntagonistsAnesthesiaMuscle ContractionAcetylcholineReceptors, NicotinicDose-Response Relationship, DrugTime Factors