Marin E L, Vernick S, Friedmann L W
Arch Phys Med Rehabil. 1983 May;64(5):206-8.
The purpose of this study was to determine the effect of wrist position on distal sensory and motor latencies of the median nerve. An orthosis was devised to maintain the wrist either in extension or in flexion while measuring these latencies. Fourteen patients with presumptive carpal tunnel syndrome (CTS) and 12 control subjects were evaluated following extension or flexion of the wrist for 5 and 10 minutes. Results showed an increase in distal latencies for both groups; the highest increment was found among CTS patients following 5 minutes of wrist flexion. Since it is not uncommon for patients to present with classical CTS symptoms but without electrodiagnostic findings in support of such diagnosis, it is suggested that such patients be reevaluated after 5 minutes of wrist flexion (median nerve stress) test.
本研究的目的是确定手腕位置对正中神经远端感觉和运动潜伏期的影响。设计了一种矫形器，在测量这些潜伏期时将手腕保持在伸展或屈曲位置。对14例疑似腕管综合征（CTS）患者和12例对照受试者在手腕伸展或屈曲5分钟和10分钟后进行评估。结果显示两组的远端潜伏期均增加；在手腕屈曲5分钟后的CTS患者中发现增幅最大。由于患者出现典型的CTS症状但无电诊断结果支持这种诊断的情况并不少见，建议在进行5分钟的手腕屈曲（正中神经应激）试验后对这些患者进行重新评估。
