Table 2.

Spinal Accessory Nerve Connection to the Infraspinatus Muscle as Well as to the Upper Trapezius Muscle Evaluated with Needle Electromyography at Mean 5 Years Postoperative

Patient	Infraspinatus MUP Analysis
	Time From Surgery (years)	Interference Pattern	MUP Size	MUP Polyphasia	MUP Duration	Conclusion
1	4.9	Mildly reduced	Normal	Normal	Normal	Very mild abnormality
2	5.3	Moderately reduced	+++	Normal	+++	Moderate abnormality
3	4.9	Mildly reduced	+++	++	Normal	Mild abnormality
4	5.2	Moderately reduced	++	+	+++	Moderate abnormality
5	5.2	Moderately reduced	+	Normal	NA	Moderate abnormality
6	3.0	NA	Normal	++	++	Mild abnormality
12	4.6	Moderately reduced	+	Normal	+	Moderate abnormality

Moderate abnormality is defined as reduced recruitment of MUPs, abnormally enlarged, polyphasic, and long-duration MUPs. Mild abnormality is defined as mildly reduced recruitment of MUPs, abnormally enlarged, polyphasic, and long-duration MUPs. Very mild abnormality is defined as mildly reduced recruitment of MUPs, no abnormalities in MUP morphology.

+ Slightly increased; ++ moderately increased; +++ severely increased.

NA, not available.