Table 5.

All muscle pairs with a highly correlated EMG activation pattern

Muscle	Rotator cuff tear group	Control group
AD with	MD, UT, LD	MD, PM, UT, ISP, SSC
MD with	UT, LD	PM, UT, ISP, SSC
PD with		BB
UT with	LD	PM
PM with		ISP, SSC
ISP with	SSP	SSP, SSC

Pearson correlation coefficient R > 0.70; AD = anterior deltoid; MD = middle deltoid; PD = posterior deltoid; PM = pectoralis major; UT = upper trapezius; LD = latissimus dorsi; BB = biceps brachii; SSP = supraspinatus; ISP = infraspinatus; SSC = subscapularis.

For full details on all R and p values, see Appendix 1.