Consented subjects randomized to one of four doses of rocuronium will be transported to the operating room and be connected to routine monitors that included a BIS (Covidien), M-Entropy sensor (GE Healthcare) and TOF (train of four) monitor. Following preoxygenation, general anesthesia will be induced with propofol and remifentanil using traditional syringe pumps. The induction doses given and subsequent infusion rates will be determined by utilizing pharmacokinetic (Pk) models (Marsh model for propofol, Minto model for remifentanil). Unconsciousness will be confirmed by performing the usual clinical assessments and by obtaining a BIS value between 40 and 50. Once the subject is unconsciousness, they will be given the assigned dose of rocuronium, after which the study anesthesiologist will perform a laryngoscopy. The anesthesiologist performing the laryngoscopy will not know what dose of rocuronium the subject received. Neuromuscular blockade (NMB) will be monitored by a train-of-four twitch monitor (TOF Watch-SX) at the adductor pollicis muscle (2 HZ, 50mAmp) every 15 seconds.