MOINA3

• What is the origin of the Deltoid muscle?

  Lateral third of clavicle, acromion, spine of scapula
• Where does the Deltoid muscle insert?

  Middle of lateral surface of shaft of humerus
• What is the nerve supply for the Deltoid muscle?

  Axillary nerve
• What are the nerve roots associated with the Deltoid muscle?

  C5, 6
• What actions does the Deltoid muscle perform?

  Abducts arm; anterior fibers flex and medially rotate arm; posterior fibers extend and laterally rotate arm
• What is the origin of the Supraspinatus muscle?

  Supraspinous fossa of scapula
• Where does the Supraspinatus muscle insert?

  Greater tuberosity of humerus; capsule of shoulder joint
• What is the nerve supply for the Supraspinatus muscle?

  Suprascapular nerve
• What are the nerve roots associated with the Supraspinatus muscle?

  C4, 5, 6
• What action does the Supraspinatus muscle perform?

  Abducts arm and stabilizes shoulder joint
• What is the origin of the Infraspinatus muscle?

  Infraspinous fossa of scapula
• Where does the Infraspinatus muscle insert?

  Greater tuberosity of humerus; capsule of shoulder joint
• What is the nerve supply for the Infraspinatus muscle?

  Suprascapular nerve
• What are the nerve roots associated with the Infraspinatus muscle?

  (C4), 5, 6
• What action does the Infraspinatus muscle perform?

  Laterally rotates arm and stabilizes shoulder joint
• What is the origin of the Teres major muscle?

  Lower third of lateral border of scapula
• Where does the Teres major muscle insert?

  Medial lip of bicipital groove of humerus
• What is the nerve supply for the Teres major muscle?

  Lower subscapular nerve
• What are the nerve roots associated with the Teres major muscle?

  C6, 7
• What actions does the Teres major muscle perform?

  Medially rotates and adducts arm and stabilizes shoulder joint
• What is the origin of the Teres minor muscle?

  Upper two thirds of lateral border of scapula
• Where does the Teres minor muscle insert?

  Greater tuberosity of humerus; capsule of shoulder joint
• What is the nerve supply for the Teres minor muscle?

  Axillary nerve
• What are the nerve roots associated with the Teres minor muscle?

  (C4), C5, 6
• What action does the Teres minor muscle perform?

  Laterally rotates arm and stabilizes shoulder joint
• What is the origin of the Subscapularis muscle?

  Subscapular fossa