Shoulder and arm Muscles and movements #1 Shoulder and arms muscles and movements #1 Please list the...

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Medical Sciences

Shoulder and arm Muscles and movements #1
Shoulder and arms muscles and movements #1
Please list the action demonstrated, two synergist and oneantagonist. The first letter of each muscles has been provided

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Shoulder Joint The shoulder is a complex ballandsocket joint comprising the head of the humerus the clavicle collarbone and the scapula The muscles in the shoulder help in a wide range of movement and also protect and maintain the main shoulder joint known as the glenohumeral joint The shoulder has about nine muscles that attach to the scapula humerus and clavicle These muscles form the outer shape of the shoulder and underarm The muscles in the shoulder aid in a wide range of movement and help protect and maintain the main shoulder joint known as the glenohumeral joint The largest of these shoulder muscles is the deltoid This large triangular muscle covers the glenohumeral joint and gives the shoulder its roundedoff shape It stretches across the top of the shoulder from the clavicle in the front to the scapula in the back It then stretches downward to near the center of the humerus bone One important function of the deltoid is preventing joint dislocation when a person carries heavy objects The muscles that aid in shoulder movement include Infraspinatus This rotator cuff muscle helps with the raising and lowering of the upper arm Triceps brachii This large muscle in the back of the upper arm helps straighten the arm See Answer

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