The suprascapular nerve contributes sensory fibres to the shoulder joint and provides motor innervation to the supraspinatus and infraspinatus muscles.
First to identify via ultrasonography is the characteristic shape of the infraspinatus muscle tendon unit.
The intrinsic muscles of the scapula include the muscles of the rotator cuff- the subscapularis, teres minor, supraspinatus, and infraspinatus.
In addition, a moderately strong association between the area of the full-thickness tear and the resulting increase in pennation angle of the infraspinatus was visible.
The flat iron steak lies above it, and is distinct from this steak, as it is formed from different muscles: teres minor and infraspinatus.
Other muscles that aid the posterior deltoid include the two lateral rotators of the rotor cuff: the infraspinatus and teres minor.
This may cause paralysis of both supraspinatus and infraspinatus muscles.
However, a correlation between full-thickness rotator cuff tear size and the pennation angle of the supraspnatus and infraspinatus muscles was evident.
