Brys D, Waters R L
J Hand Surg Am. 1987 Mar;12(2):237-9. doi: 10.1016/s0363-5023(87)80278-2.
Fifteen patients with traumatic quadriplegia who had transfer of the brachioradialis to the flexor pollicis longus were evaluated to determine the influence of triceps function on pinch strength. Pinch was measured with the elbow free and with the elbow locked at 90 degrees in an orthosis that served as an external means of blocking elbow flexion in those patients with impaired triceps strength. Those patients having two foot-pounds or less elbow extension torque had an average pinch of 1.20 kg without elbow immobilization. With the elbow immobilized, pinch strength increased 153%, averaging 3.04 pounds. Those patients having more than two foot-pounds elbow extension torque had an average pinch of 4.08 pounds with the elbow free and pinch strength was not improved by immobilization in the orthosis. The absence of triceps function significantly decreases the effectiveness of the brachioradialis when used to motor a tendon transfer. Surgical procedures, such as posterior deltoid to triceps transfer, which provide active elbow extension can be expected to significantly increase the pinch strength supplied through the brachioradialis transfer in patients without voluntary elbow extension.
对15例因创伤导致四肢瘫痪且已将肱桡肌转移至拇长屈肌的患者进行了评估，以确定肱三头肌功能对捏力的影响。在肘部自由状态下以及在一种矫形器中将肘部锁定在90度时测量捏力，该矫形器作为一种外部手段，用于限制肱三头肌力量受损患者的肘部屈曲。那些肘部伸展扭矩为两英尺磅或更小的患者，在肘部未固定时平均捏力为1.20千克。当肘部固定时，捏力增加了153%，平均为3.04磅。那些肘部伸展扭矩超过两英尺磅的患者，肘部自由时平均捏力为4.08磅，并且在矫形器中固定肘部后捏力并未改善。肱三头肌功能的缺失会显著降低在用于驱动肌腱转移时肱桡肌的有效性。诸如将三角肌后部转移至肱三头肌等能提供主动肘部伸展的外科手术，有望显著增加那些无自主肘部伸展的患者通过肱桡肌转移所提供的捏力。
