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Upper Limb Muscles

URI Anatomy Quiz 12: Muscles of the Upper Limb

QuestionAnswer
Its origin is the lateral 1/3 of the clavicle, acromion, and spine of the scapula. It is the prime flexor and abductor of the humerus. It also extends and hyperextends the humerus; laterally and medially rotates the humerus. Inserts on humerus. Deltoid muscle with the axillary nerve
It's origin is the sternum, costal cartilage of ribs 1-6 (or 7), clavicle, aponeurosis of the external oblique muscle. It Adducts, flexes, and medially rotates the humerus; sternal portion extends the humerus. Inserts on the humerus. Pectoralis major muscle with the Medial and Lateral Pectoral nerves (C5 - T1)
It's origin is the Iliac crest, T7-T12, ribs 10-12, and the lumbar fascia. It extends, hyperextends, adducts, and medially rotates the humerus. It inserts on the humerus. Latissimus dorsi muscle with the thoracodorsal nerve
It's origin is the lateral border of the scapula. It extends, adducts, and medially rotates the humerus. It inserts on the humerus. Teres Major muscle with the lower subscapular nerve
It's origin is the corocoid process of the scapula. It flexes and adducts the humerus and stabilizes the shoulder joint. It inserts on the humerus. Coracobrachialis muscle with the musculocutaneous nerve