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The middle (middle) deltoid: Responsible for shoulder abduction (lifting the arm away from the body). The posterior (back) deltoid: Assists with shoulder extension and outward rotation.
At the glenohumeral joint, movement of the humerus is performed by a combination of transverse abduction, by the posterior and lateral deltoids, [3] and external rotation, by the infraspinatus and teres minor. [4] At the scapulothoracic joint, the middle and lower fibers of the trapezius and the rhomboids contract to perform retraction of the ...
The shoulder abduction relief test, also called Bakody's test, is a medical maneuver used to evaluate for cervical radiculopathy. [1] Specifically, this test is used to evaluate for nerve root compression at C5-C7. It is often used when a patient presents with neck pain that radiates down the ipsilateral upper extremity. [2]
A U.S. marine performing a pull-up. A pull-up is an upper-body strength exercise.The pull-up is a closed-chain movement where the body is suspended by the hands, gripping a bar or other implement at a distance typically wider than shoulder-width, and pulled up.
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Abduction and adduction of the shoulder (frontal plane). Abduction is carried out by the deltoid and the supraspinatus in the first 90 degrees. From 90-180 degrees it is the trapezius and the serratus anterior. Adduction is carried out by the pectoralis major, latissimus dorsi, teres major and the subscapularis. Horizontal abduction and ...
Deltoid muscle with superior limb in abduction. When all its fibers contract simultaneously, the deltoid is the prime mover of arm abduction along the frontal plane. The arm must be medially rotated for the deltoid to have maximum effect. [12] This makes the deltoid an antagonist muscle of the pectoralis major and latissimus dorsi during arm ...
Straighten right leg long while turning upper body left and bring right elbow toward left knee, twisting at the ribs and leading with shoulder rather than elbow. That’s 1 rep. Switch and repeat ...