Rotator cuff

Rotator cuff(회전근개)는 shoulder 관절의 움직임을 담당하며 supraspinatus muscle(SST), infraspinatus muscle(IST), subscapularis muscle(SSC) & teres minor muscle로 구성된다.

• subscapularis muscle만 lesser tubercle로 insertion, 나머지는 greater tubercle이고 서로 overlap 되어있음.

Subscapularis

• adduction
• insertion: upper 2/3 lesser tuberosity, 1/3 inferior aspect of lesser tuberosity and shaft

Supraspinatus

• abduction
• insertion: greater tuberosity(superior impression), (additional insertion to lesser tuberosity)

Infraspinatus

• abduction
• insertion: greater tuberosity(superior and middle impression)

Teres minior

• external rotation
• insertion: greater tuberosity(inferior impression)

Related Disease

• rotator cuff tear
• suprascapular nerve entrapment syndrome: suprascapular notch(Spinoglenoid notch)의 cyst 등에 의한 suprascapular nerve(SST and IST innervation) compression.