Fig. 1. The age of all patients (x-axis) in the elderly and young groups and complete sensory (CSB, A ) or motor block (CMB, B ) duration (y-axis) are shown. Postoperatively, sensory and motor blocks were assessed hourly for 9 h after time zero. Recovery from sensory and motor blocks was defined as any score greater than 0 in any distribution of the radial, median, musculocutaneous, or ulnar nerve. The durations of complete sensory and motor blockade were calculated for each patient as follows: (onset time to a complete sensory or motor block) − (time of recovery from complete sensory or motor block). Durations of complete sensory (ρ= 0.56;P < 0.05) and motor blocks (ρ= 0.46;P < 0.05) were significantly correlated with aging.