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Table 3 Preoperative EMG/NCS results of the two groups

From: Comparison of clinical outcome of decompression of suprascapular nerve at spinoglenoid notch for patients with posterosuperior massive rotator cuff tears and suprascapular neuropathy

Rotator cuff Spontaneous potential Motor unit potential recruitment pattern Compound muscle action potential
Fibrillation potentials
(0, 1 + , 2 + , 3+)
Positive sharp waves
(0, 1 + , 2 + , 3+)
Increased duration
(n)
Increased amplitude
(n)
Weaken
(n)
Latency
(x ± s, ms)
Amplitude
(x ± s, mV)
Releasing group (A)
 supraspinatus 5, 5, 0, 0 6, 4, 0, 0 2 2 2 3.07 ± 0.82 10.08 ± 1.98
 infraspinatus 0, 2, 5, 3 0, 2, 7, 1 10 9 10 7.75 ± 1.09 7.74 ± 1.22
Non-releasing group (B)
 supraspinatus 5, 4, 1, 0 5, 5, 0, 0 3 2 2 3.30 ± 0.87 9.90 ± 1.78
 infraspinatus 0, 1, 6, 3 0, 2, 5, 3 10 9 9 7.63 ± 1.15 7.41 ± 1.28