Figure 5. Relationship between the recovery time of the electro-myographic response of adductor pollicis (Ap EMG) and geniohyoid muscle (Gh EMG) at 75%(TH75) and 90%(TH90) of twitch height control values in eight patients receiving vecuronium (0.1 mg *symbol* kg sup -1). Each symbol represents an individual patient. Filled symbols and open symbols correspond to TH75 and to TH90 values, respectively. A linear relationship was observed between ApEMG and GhEMG corresponding to TH75 (GhEMG (min) 1.12 ApEMG (min) 2.8 min, r 0.73, P < 0.05) and to TH90 (GhEMg (min) 0.93 ApEMG (min)+ 4.5 min, r = 0.90, P < 0.01).