8/17/2019 Key Points of the Rotator Cuff

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Shoulder key points

- Muscles of the rotator cu – Supraspinatus, infraspinatus, teres minor,

and subscapularis.

Supraspinatus – Runs along the top of the scapula and pulls the humerus bone

laterally towards the midline of the body.

Infraspinatus/Teres minor – run from the back of the shoulder blade to the

humerus. They are both responsible for externally rotating the shoulder. Pull down

on the humerus.

Subsacpularis – runs from the underside of the scapula and assists in internally

rotating the shoulder. Pull down on the humerus.

Internal/External rotation

- The Teres Minor  and infraspinatus muscles perform external rotation of theshoulder.

- The Pectoralis major, latissumus dorsi, subscapularis, and teres major  all

assist on internal rotation of the shoulder.

Sprain – a tear in the ligament.

Strain – a tear in a muscle.

Avulsion – a tear that pulls the tendon o the bone from its insertion point.