Fig. 2. Nerve injury score for sections obtained 12 mm caudal to the conus medullaris 7 days after an intrathecal infusion of 5% lidocaine in saline, 5% lidocaine with epinephrine, epinephrine, or normal saline. Nerve injury scores were based on all fascicles present in each cross-section. Each fascicle was assigned an injury score of 0–3, where 0 = normal, 1 = mild, 2 = moderate, and 3 = severe. The injury score for each cross-section was calculated as the average score of all fascicles in the section. Data reflect the mean ± SD. * P < 0.05 versus epinephrine or saline. ** P < 0.05 versus all other groups.