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. 2019 Oct 24;4(4):e0030. doi: 10.2106/JBJS.OA.19.00030

TABLE VII.

Early Results: Time of Muscle Reinnervation Demonstrated by EMG

Case Reinnervation* After Surgery (After Palsy Onset) (mo)
Trapezius Deltoid Infraspinatus Biceps Grafted Muscle Abductor Digiti Minimi
1 5 (11.5) 3, 4
2 <13 (<24) 3
3 3 (8.5) 3 (8.5)
4 6.5 (14.5) 4 (12) 6.5 (14.5) 2.5 (10.5)
5 6 (12) 7 (13) 8 (14)
6 <6 (<16) <6 (<16)
7 4 (13.5) 4 (13.5)
8
*

The reinnervation of all muscles except 2 in Case 1 was confirmed by needle EMG.

< = far less than the estimated periods because the motor unit potentials were already mature at the time of examination.

Reinnervation was defined by visible contraction of the muscle.