lastwords

rotator cuff

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English German
rotator cuff subst.   die Rotatorenmanschette f
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Rotator_cuff aus Wikipedia. Zum Beitrag

Rotator cuff - Wikipedia, the free encyclopedia a.new,#quickbar a.new{color:#ba0000} /* cache key: enwiki:resourceloader:filter:minify-css:3:f2a9127573a22335c2a9102b208c73e7 */ Rotator cuff From Wikipedia, the free encyclopedia Jump to: , ROTATOR CUFF Muscles on the dorsum of the scapula, and the Triceps brachii. The scapular and circumflex arteries. Gray's subject #123 In anatomy, the rotator cuff (Layman's Term) or rotor cuff (Medical Terminology) is the group of muscles and their tendons that act to stabilize the shoulder. The four muscles of the rotator cuff, along with the teres major and the deltoid, make up the six scapulohumeral (those that connect to the humerus and scapula and act on the glenohumeral joint) muscles of the human body.

Contents

Function

The rotator cuff muscles are important in shoulder movements and in maintaining These muscles arise from the During abduction of the arm, the rotator cuff compresses the glenohumeral joint, a term known as concavity compression, in order to allow the large deltoid muscle to further elevate the arm. In other words, without the rotator cuff, the humeral head would ride up partially out of the glenoid fossa, lessening the efficiency of the deltoid muscle. The anterior and posterior directions of the glenoid fossa are more susceptible to shear force perturbations as the glenoid fossa is not as deep relative to the superior and inferior directions. The rotator cuff's contributions to concavity compression and stability vary according to their stiffness and the direction of the force they apply upon the joint.

Muscles composing rotator cuff

Muscle Origin on scapula Attachment on humerus Function Innervation Supraspinatus muscle supraspinous fossa superior and middle facet of the greater tuberosity abducts the arm Suprascapular nerve (C5) Infraspinatus muscle infraspinous fossa posterior facet of the greater tuberosity externally rotates the arm Suprascapular nerve (C5-C6) Teres minor muscle middle half of mehr

Rotator_cuff aus Wikipedia. Zum Beitrag


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