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Shoulder Muscles

Deltoid, Pec Major, Coracobrachialis

QuestionAnswer
What is the most important abductor of the shoulder? Deltoid.
Which muscle resembles the Gluteals structurally? Deltoid.
Which muscle, if discovered today, would be considered three independent muscles instead of one? Deltoid.
Which muscle of the shoulder can be an antagonist to itself? Deltoid.
What are the origins of the Deltoid muscle? lateral third (1/3) of the clavicle acromion process scapular spine
What is the insertion of the Deltoid muscle? Deltoid tuberosity.
What are the actions of the Deltoid muscle? flexes the shoulder (anterior fibers) medially rotates the shoulder (anterior fibers) abducts the shoulder (middle fibers) extends the shoulder (posterior fibers) laterally rotates the shoulder (posterior fibers)
What is the nerve of the Deltoid muscle? Axillary.
What is the origins of the Pectoralis Major? medial half (1/2) of the clavicle edge of the sternal body ribs 1 through 7 (costal cartilages)
What is the insertion of Pectoralis Major? intertubercle groove of the humerus (lateral lip)
What is the actions of the Pectoralis Major? adduct the shoulder medially rotates the shoulder flexes the shoulder extends the shoulder
What is the nerve for Pectoralis Major? Medial pectoral nerve.
Which muscle forms the upper anterior chest wall and anterior axillary fold? Pectoralis Major.
Tightness in which muscle can cause constriction of the chest and angina pectoralis - like pain or postural distortion such as rounded shoulders? Pectoralis Major.
What is the origin of Coracobrachialis? Coranoid process of the scapula.
What is the insertion of Coracobrachialis? Medial humeral shaft (middle region).
What are the actions of Coracobrachialis? flexes the shoulder adducts the shoulder
What is the nerve for Coracobrachialis? Musculocutaneous nerve.
Created by: 1403520623
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