Johnson E W, Kukla R D, Wongsam P E, Piedmont A
Arch Phys Med Rehabil. 1981 May;62(5):206-8.
Sensory innervation to the ring finger (digit IV) is generally shared by the digital branches of the median and ulnar nerves. In 74 hand studies on 37 normal adults, all had a recordable response in digit IV upon stimulation of the median and ulnar nerves antidromically 14cm proximally to the recording electrodes. Comparing the median sensory latency to digit IV with the ulnar sensory latency to the same digit, the difference was 0.3msec or less in 93% of the hands. In 18 cases of carpal tunnel syndrome, the difference ranged from 1 to 2.1msec. This procedure may be of value as an easily performed and rapid technique to screen vulnerable nerve syndromes for possible entrapment and to provide baseline data for asymptomatic hands in individuals with carpal tunnel syndrome.
环指（第四指）的感觉神经支配通常由正中神经和尺神经的指支共同提供。在对37名正常成年人进行的74次手部研究中，在记录电极近端14厘米处逆向刺激正中神经和尺神经时，所有受试者的环指均有可记录的反应。将正中神经至环指的感觉潜伏期与尺神经至同一手指的感觉潜伏期进行比较，93%的手部差异为0.3毫秒或更小。在18例腕管综合征病例中，差异范围为1至2.1毫秒。该检查方法作为一种易于实施且快速的技术，对于筛查可能发生卡压的易损神经综合征以及为腕管综合征患者无症状的手部提供基线数据可能具有价值。
