Microsurgery
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The purpose of this study was to evaluate the quantitative muscle strength to distinguish the outcomes of different injury levels in upper arm type brachial plexus injury (BPI) patients with double nerve transfer. ⋯ Upper arm type BPI patients have a good motor recovery after double nerve transfer. The different outcomes between C5-C6 and C5-C7 BPI patients appeared in muscles responding to hand grip, wrist extension, and sagittal movements in shoulder and elbow joints.