Kimura I, Ayyar D R, Lippmann S M
Tohoku J Exp Med. 1983 Nov;141(3):269-74. doi: 10.1620/tjem.141.269.
One hundred and fifty upper extremities of 85 unselected subjects were studied. Supramaximal nerve stimulation of the median and ulnar nerves at the wrist and elbow was used and the compound muscle action potentials (CMAPs) from the abductor pollicis brevis (APB) muscle were recorded. The ulnar to median nerve communication in the hand -- Riche-Cannieu anastomosis -- was detected in 125 out of 150 hands (83.3%). The ulnar to median nerve communication in the forearm was demonstrated in only two out of 150 extremities (1.3%). The mean ulnar nerve innervation ratio (UNIR) in the APB was 27.6 +/- 16.4% (mean +/- S.D.). In the American black population, this UNIR percentage was statistically smaller than in the American caucasian or hispanic population (p less than 0.05).
对85名未经挑选的受试者的150条上肢进行了研究。采用在手腕和肘部对正中神经和尺神经进行超强神经刺激，并记录来自拇短展肌（APB）的复合肌肉动作电位（CMAPs）。在150只手中，有125只手（83.3%）检测到了手部尺神经与正中神经的交通支——里什-卡尼厄吻合。在150条上肢中，只有2条（1.3%）显示出前臂尺神经与正中神经的交通支。APB中尺神经的平均支配率（UNIR）为27.6±16.4%（平均值±标准差）。在美国黑人人群中，该UNIR百分比在统计学上低于美国白种人或西班牙裔人群（p<0.05）。
