Nerve block means the injection of a local anesthetic or a neurolytic agent into or near a peripheral nerve, a sympathetic nerve plexus, or a local pain-sensitive trigger point.

• 在神经干、神经丛或神经节的周围注射局麻药，阻滞其冲动传导，使受它支配的区域产生麻醉作用，称神经阻滞。