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<div class="pre-content"><div><div class="bk_prnt"><p class="small">NCBI Bookshelf. A service of the National Library of Medicine, National Institutes of Health.</p><p>StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. </p></div></div></div>
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<div class="main-content lit-style" itemscope="itemscope" itemtype="http://schema.org/CreativeWork"><div class="meta-content fm-sec"><h1 id="_NBK441844_"><span class="title" itemprop="name">Anatomy, Rotator Cuff</span></h1><p class="contrib-group"><h4>Authors</h4><span itemprop="author">Smita Maruvada</span>; <span itemprop="author">Antonio Madrazo-Ibarra</span><sup>1</sup>; <span itemprop="author">Matthew A. Varacallo</span><sup>2</sup>.</p><h4>Affiliations</h4><div class="affiliation"><sup>1</sup> Universidad Panamericana</div><div class="affiliation"><sup>2</sup> Penn Highlands Healthcare System</div><p class="small">Last Update: <span itemprop="dateModified">March 27, 2023</span>.</p></div><div class="body-content whole_rhythm" itemprop="text"><div id="article-28651.s1"><h2 id="_article-28651_s1_">Introduction</h2><p>The rotator cuff is a group of muscles in the shoulder that allow a wide range of movement while maintaining the stability of the glenohumeral joint (see <b>Image.</b> Rotator Cuff Muscles). The rotator cuff includes the following muscles<a class="bk_pop" href="#article-28651.r1">[1]</a><a class="bk_pop" href="#article-28651.r2">[2]</a><a class="bk_pop" href="#article-28651.r3">[3]</a>: </p><ul><li class="half_rhythm"><div>Subscapularis</div></li><li class="half_rhythm"><div>Infraspinatus</div></li><li class="half_rhythm"><div>Teres minor</div></li><li class="half_rhythm"><div>Supraspinatus (see <b>Image.</b> Rotator Cuff Muscles Anatomy)</div></li></ul><p>A helpful mnemonic to remember these muscles is "SITS".</p><p>The glenohumeral joint is a ball and socket joint and comprises a large spherical humeral head and a small glenoid cavity. This anatomy makes the joint highly mobile, however, really unstable. Stabilization in the shoulder is provided collectively by the non-contractile tissue of the glenohumeral joint (static stabilizers) such as the capsule, the labrum, the negative intraarticular pressure, and the glenohumeral ligaments; and the contractile tissues (dynamic stabilizers) such as the rotator cuff muscles and the long head of the biceps brachii. See <b>Image.</b> Muscles and Fascia of the Shoulder.</p></div><div id="article-28651.s2"><h2 id="_article-28651_s2_">Structure and Function</h2><p>The primary biomechanical role of the rotator cuff is to stabilize the glenohumeral joint by compressing the humeral head against the glenoid. These four muscles arise from the scapula and insert into the humerus. The tendons of the rotator cuff muscles blend with the joint capsule and form a musculotendinous collar that surrounds the posterior, superior, and anterior aspects of the joint, leaving the inferior aspect unprotected. This arrangement is an important factor since most shoulder luxations occur because the humerus slides inferiorly through the unprotected part of the joint. During arm movements, the rotator muscles contract and prevent the sliding of the head of the humerus, allowing full range of motion and providing stability. </p><p>Additionally, rotator cuff muscles help in the mobility of the shoulder joint by facilitating abduction, medial rotation, and lateral rotation.</p><ul><li class="half_rhythm"><div>Subscapularis: Medial (internal) rotation of the shoulder</div></li><li class="half_rhythm"><div>Supraspinatus: Abduction of the arm</div></li><li class="half_rhythm"><ul><li class="half_rhythm"><div>Necessary for the initial 0 to 15 degrees of shoulder abduction motion </div></li><li class="half_rhythm"><div>The deltoid muscle abducts the arm beyond 15 degrees </div></li></ul></li><li class="half_rhythm"><div>Infraspinatus: Lateral (external)  rotation of the shoulder</div></li><li class="half_rhythm"><div>Teres Minor: Lateral (external) rotation of the shoulder</div></li></ul><p>During physical examination, each muscle can be evaluated independently based on its specific movements.</p></div><div id="article-28651.s3"><h2 id="_article-28651_s3_">Embryology</h2><p>Mesoderm gives rise to the muscles and ligaments in the body.</p></div><div id="article-28651.s4"><h2 id="_article-28651_s4_">Blood Supply and Lymphatics</h2><p>The vascular supply to the rotator cuff muscles is mainly via the suprascapular artery, the subscapular artery, and the posterior circumflex humeral artery.</p><p>The <b>suprascapular artery</b> is a branch of the thyrocervical trunk (a major branch of the subclavian artery) and originates at the base of the neck. It enters the posterior scapular region superior to the suprascapular foramen (the nerve passes through the foramen) and supplies the <b>supraspinatus</b> and <b>infraspinatus</b> muscles. </p><p>The <b>subscapular artery </b>is the largest branch of the axillary artery. It originates from the third part of the axillary artery, follows the inferior margin of the subscapularis muscle, and then divides into the circumflex scapular artery and the thoracodorsal artery. It gives vascular supply to the <b>subscapularis muscle</b>. </p><p>The <b>posterior circumflex humeral artery </b>originates from the third part of the axillary artery in the axilla. It enters the posterior scapular region through the quadrangular space (accompanied by the axillary nerve) and supplies the <b>teres minor</b> muscle. </p><p>All lymphatics from the upper limb drain into lymph nodes in the axilla.</p></div><div id="article-28651.s5"><h2 id="_article-28651_s5_">Nerves</h2><p>The <b>subscapular nerve</b> (upper and lower branches) innervates the <b>subscapularis muscle. </b></p><ul><li class="half_rhythm"><div>Originate from the posterior cord of the brachial plexus</div></li><li class="half_rhythm"><div>C5, C6, C7</div></li></ul><p>The <b>suprascapular nerve</b> innervates the <b>infraspinatus and supraspinatus</b></p><ul><li class="half_rhythm"><div>Originates from the superior trunk of the brachial plexus</div></li><li class="half_rhythm"><div>Passes through the suprascapular foramen</div></li><li class="half_rhythm"><div>C5 and C6</div></li></ul><p>The <b>axillary nerve</b> innervates <b>teres minor</b></p><ul><li class="half_rhythm"><div>Originates from the posterior cord of the brachial plexus</div></li><li class="half_rhythm"><div>Passes through the quadrangular space into the posterior scapula region</div></li><li class="half_rhythm"><div>C5 and C6</div></li></ul></div><div id="article-28651.s6"><h2 id="_article-28651_s6_">Muscles</h2><p>The<b> subscapularis</b> is the largest component of the posterior wall of the axilla. It prevents the anterior dislocation of the humerus during abduction and medially rotates the humerus. A large bursa separates the muscle from the neck of the scapula <a class="bk_pop" href="#article-28651.r4">[4]</a>.</p><ul><li class="half_rhythm"><div>Origin: subscapular fossa of the scapula</div></li><li class="half_rhythm"><div>Insertion: lesser tubercle of the humerus</div></li></ul><p>The <b>supraspinatus</b> muscle is the only muscle of the rotator cuff that is not a rotator of the humerus. </p><ul><li class="half_rhythm"><div>Origin: supraspinous fossa of the scapula </div></li><li class="half_rhythm"><div>Passes above the glenohumeral joint </div></li><li class="half_rhythm"><div>Insertion: greater tuberosity of the humerus</div></li></ul><p>The <b>infraspinatus</b> is a powerful lateral rotator of the humerus. The tendon of this muscle is sometimes separated from the capsule of the glenohumeral joint by a bursa.</p><ul><li class="half_rhythm"><div>Origin: infraspinous fossa of the scapula </div></li><li class="half_rhythm"><div>Insertion: greater tuberosity of the humerus, immediately below the supraspinatus. </div></li></ul><p>The <b>teres minor</b> is a narrow and long muscle entirely covered by the deltoid, hardly differentiated from the infraspinatus. </p><ul><li class="half_rhythm"><div>Origin: lateral border of the scapula (below the infraglenoid tubercle) </div></li><li class="half_rhythm"><div>Insertion: greater tuberosity of the humerus, below the infraspinatus tendon.</div></li></ul></div><div id="article-28651.s7"><h2 id="_article-28651_s7_">Clinical Significance</h2><p>
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<b>Physical Examination</b>
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<a class="bk_pop" href="#article-28651.r5">[5]</a>
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</p><p>Rotator cuff muscles can undergo independent evaluation when the patient presents with rotator cuff syndrome.  </p><ul><li class="half_rhythm"><div><b>Supraspinatus muscle</b>: The evaluation of this muscle is with the Jobe's test, commonly known as the "empty can" test. It is done with a 90 degrees abduction and internal rotation (thumb pointing to the floor) of the arm while pressing down on the arm. The test is positive if this is painful or weak. </div></li></ul><ul><li class="half_rhythm"><div><b>Infraspinatus muscle</b>: Evaluation of this muscle is via lateral rotation against resistance with the elbow flexed and the arm in a neutral abduction/adduction position.</div></li></ul><ul><li class="half_rhythm"><div><b><b>Teres minor muscle: </b></b>This muscle's evaluation is with the hornblower's test, done with the arm at 90 degrees abduction, the elbow flexed (90 degrees), and doing a lateral rotation against resistance. The test is positive if this is painful or weak. </div></li></ul><ul><li class="half_rhythm"><div><b>Subscapularis muscle</b>: Evaluating this muscle uses the "lift-off" and the "bear hug" test. In the lift-off test, the patient brings the hands around the back to the lumbar region with the palms facing outward. The test is positive if the patient is unable to lift the hands away from the back. On the Bear hug test, the patient places the ipsilateral palm on the opposite deltoid and tries to resist the examiner pulling it away anteriorly. </div></li></ul><p>
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<b>Rotator Cuff Syndrome </b>
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<a class="bk_pop" href="#article-28651.r1">[1]</a>
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<a class="bk_pop" href="#article-28651.r6">[6]</a>
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<a class="bk_pop" href="#article-28651.r7">[7]</a>
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<a class="bk_pop" href="#article-28651.r8">[8]</a>
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</p><p>Rotator cuff syndrome (RCS) describes a spectrum of clinical pathology ranging from minor injuries such as acute rotator cuff tendinitis to advanced/chronic rotator cuff tendinopathy and degenerative conditions.</p><p>Rotator cuff injuries represent a common cause of shoulder pain. The rotator cuff tendons, particularly the supraspinatus tendon, are uniquely susceptible to the compressive forces of subacromial impingement. Improper athletic technique, poor posture, poor conditioning, and failure of the subacromial bursa to protect the supporting tendons results in a progressive injury from acute inflammation, to calcification, to degenerative thinning, and finally to a tendon tear (see <b>Image.</b> Rotator Cuff Tear).</p><p>
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<b>Rotator cuff (RC) Tendonitis/Tendinosis</b>
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</p><p>Acute or chronic tendinopathic conditions that result from a vulnerable environment for the RC secondary to repetitive eccentric forces and predisposing anatomical/mechanical risk factors. </p><p>
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<b>Shoulder Impingement </b>
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</p><p>A clinical term often used nonspecifically to describe patients experiencing pain/symptoms with overhead activities. It is best to subdivide shoulder impingement into internal and external conditions: </p><ul><li class="half_rhythm"><div><b>Internal impingement</b><a class="bk_pop" href="#article-28651.r9">[9]</a>: Common in overhead-throwing athletes such as baseball pitchers and javelin throwers. Impingement occurs at the posterior/lateral articular side of the cuff as it abuts the posterior/superior glenoid rim and labrum when the shoulder is in maximum abduction and external rotation (i.e., the "late cocking" phase of throwing)</div></li><li class="half_rhythm"><ul><li class="half_rhythm"><div>The term "thrower's shoulder" refers to a common set of anatomic adaptive changes that occur over time in this subset of athletes.</div></li><li class="half_rhythm"><div>These adaptive changes include but are not limited to increased humeral retroversion and posterior capsular tightness. </div></li><li class="half_rhythm"><div>Glenohumeral internal rotation deficit (GIRD) is a condition resulting from these anatomic adaptations, and GIRD is known to predispose the thrower's shoulder to internal impingement.</div></li></ul></li><li class="half_rhythm"><div><b>External impingement</b>: a term used synonymously with SIS. External impingement (EI) encompasses etiologies of external compressive sources (i.e., the acromion), leading to subacromial bursitis and bursal-sided injuries to the RC <a class="bk_pop" href="#article-28651.r10">[10]</a>.</div></li></ul><p>
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<b>History and Physical for RCS</b>
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</p><p>The primary complaint is shoulder pain localized on the lateral aspect. It worsens with overhead activities, and patients often describe a painful arc during flexion and abduction at 60 degrees to 120 degrees and report pain at night due to lying on the same side. The presentation can be acute or chronic in onset. Young patients usually have an acute presentation because of a recent traumatic event or significant overexertion (e.g., lifting a heavy box). The function is often significantly impaired. Older patients or patients with repetitive overhead activities present chronically, and the loss of strength and function occurs gradually. The range of motion is normal, with positive provocative tests like Hawkins (pain on passive forced internal rotation of the shoulder). The drop arm test is confirmatory. If weakness is present on shoulder abduction, a rotator cuff tear should be suspected (MRI is the best test for diagnosis of rotator cuff tear).</p><p>
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<b>Treatment for RCS</b> <a class="bk_pop" href="#article-28651.r11">[11]</a></p><p>The American Academy of Orthopedic Surgeons (AAOS) suggests patients with rotator cuff problems without tears can be treated conservatively with exercise and NSAIDs. The patient must understand to limit overhead activities and to use ice packs or heating pads. Proper physical therapy effectively treats most patients without subacromial decompression. No difference in outcome has been reported for surgery over physical therapy in several trials. Subacromial injection with steroids showed a short-term benefit in some trials and may improve a patient's compliance with physical therapy. Surgical consultation merits consideration if symptoms do not improve three months after conservative management. Arthroscopic acromioplasty may be a topic to discuss with the patient.</p><p>
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<b>Partial- versus Full-Thickness Rotator Cuff Tears </b>
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</p><p>Etiologies and underlying causes are known to be multifactorial. Degeneration, impingement, and tension overload due to trauma may all lead to rotator cuff tears. Most often, the tears initially begin as partial tears of the supraspinatus tendon. Eventually, they can progress to full-thickness tears including all four of the rotator cuff muscles.</p><p>It primarily presents in middle-aged to older patients. Repetitive overhead activities are commonly the reason for younger athletes.</p><p>
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<b>History and Physical </b>
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</p><p>Pain and weakness are the presenting symptoms. Pain is prominent over the lateral deltoid, worsens with overhead activities, and by lying on the side at night. The absence of pain, however, does not exclude the diagnosis because a chunk of patients may also be asymptomatic. In fact, partial thickness tears cause more pain and disability than full-thickness tears. Painful arc test, drop arm test, and weakness in the external rotation is the most common observations on physical examination.</p><p>X-rays are usually normal and can help in diagnosing large rotator cuff tears if imaging shows humeral migration over the glenoid, and the patient has a symptomatic shoulder.</p><p>MRI can provide key information as to the degree of muscle tear, tendon retraction, and muscle atrophy, which is critical in planning for rotator cuff repair.</p><p>
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<b>Treatment</b>
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</p><p>Conservative treatment with NSAIDs, and most importantly, physical therapy, should be the first attempt at therapy. Surgical treatment with arthroscopy is done in cases of both acute or chronic full-thickness tears since delay can result in significant muscle atrophy, tendon retraction, and poorer surgical results.</p></div><div id="article-28651.s8"><h2 id="_article-28651_s8_">Review Questions</h2><ul><li class="half_rhythm"><div>
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<a href="https://www.statpearls.com/articlelibrary/commentarticle/28651/?utm_source=pubmed&utm_campaign=comments&utm_content=28651" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">Comment on this article.</a>
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</div></li></ul></div><div class="floats-group" id="article-28651.s9"></div><div class="floats-group" id="article-28651.s10"></div><div class="floats-group" id="article-28651.s11"></div><div class="floats-group" id="article-28651.s12"></div><div id="article-28651.s13"><h2 id="_article-28651_s13_">References</h2><dl class="temp-labeled-list"><dt>1.</dt><dd><div class="bk_ref" id="article-28651.r1">Varacallo M, El Bitar Y, Sina RE, Mair SD. <span class="ref-journal">StatPearls [Internet].</span> StatPearls Publishing; Treasure Island (FL): Mar 5, 2024. Rotator Cuff Syndrome. [<a href="https://pubmed.ncbi.nlm.nih.gov/30285401" ref="pagearea=cite-ref&targetsite=entrez&targetcat=link&targettype=pubmed">PubMed<span class="bk_prnt">: 30285401</span></a>]</div></dd><dt>2.</dt><dd><div class="bk_ref" id="article-28651.r2">Varacallo MA, El Bitar Y, Mair SD. <span class="ref-journal">StatPearls [Internet].</span> StatPearls Publishing; Treasure Island (FL): Aug 4, 2023. Rotator Cuff Tendonitis. [<a href="https://pubmed.ncbi.nlm.nih.gov/30335303" ref="pagearea=cite-ref&targetsite=entrez&targetcat=link&targettype=pubmed">PubMed<span class="bk_prnt">: 30335303</span></a>]</div></dd><dt>3.</dt><dd><div class="bk_ref" id="article-28651.r3">Cowan PT, Mudreac A, Varacallo MA. <span class="ref-journal">StatPearls [Internet].</span> StatPearls Publishing; Treasure Island (FL): Aug 8, 2023. Anatomy, Back, Scapula. [<a href="https://pubmed.ncbi.nlm.nih.gov/30285370" ref="pagearea=cite-ref&targetsite=entrez&targetcat=link&targettype=pubmed">PubMed<span class="bk_prnt">: 30285370</span></a>]</div></dd><dt>4.</dt><dd><div class="bk_ref" id="article-28651.r4">Vosloo M, Keough N, De Beer MA. The clinical anatomy of the insertion of the rotator cuff tendons. <span><span class="ref-journal">Eur J Orthop Surg Traumatol. </span>2017 Apr;<span class="ref-vol">27</span>(3):359-366.</span> [<a href="https://pubmed.ncbi.nlm.nih.gov/28204962" ref="pagearea=cite-ref&targetsite=entrez&targetcat=link&targettype=pubmed">PubMed<span class="bk_prnt">: 28204962</span></a>]</div></dd><dt>5.</dt><dd><div class="bk_ref" id="article-28651.r5">Hippensteel KJ, Brophy R, Smith MV, Wright RW. A Comprehensive Review of Physical Examination Tests of the Cervical Spine, Scapula, and Rotator Cuff. <span><span class="ref-journal">J Am Acad Orthop Surg. </span>2019 Jun 01;<span class="ref-vol">27</span>(11):385-394.</span> [<a href="https://pubmed.ncbi.nlm.nih.gov/30383577" ref="pagearea=cite-ref&targetsite=entrez&targetcat=link&targettype=pubmed">PubMed<span class="bk_prnt">: 30383577</span></a>]</div></dd><dt>6.</dt><dd><div class="bk_ref" id="article-28651.r6">Wolff AB, Sethi P, Sutton KM, Covey AS, Magit DP, Medvecky M. Partial-thickness rotator cuff tears. <span><span class="ref-journal">J Am Acad Orthop Surg. </span>2006 Dec;<span class="ref-vol">14</span>(13):715-25.</span> [<a href="https://pubmed.ncbi.nlm.nih.gov/17148619" ref="pagearea=cite-ref&targetsite=entrez&targetcat=link&targettype=pubmed">PubMed<span class="bk_prnt">: 17148619</span></a>]</div></dd><dt>7.</dt><dd><div class="bk_ref" id="article-28651.r7">Inderhaug E, Kalsvik M, Kollevold KH, Hegna J, Solheim E. Long-term results after surgical treatment of subacromial pain syndrome with or without rotator cuff tear. <span><span class="ref-journal">J Orthop. </span>2018 Sep;<span class="ref-vol">15</span>(3):757-760.</span> [<a href="/pmc/articles/PMC6014565/" ref="pagearea=cite-ref&targetsite=entrez&targetcat=link&targettype=pmc">PMC free article<span class="bk_prnt">: PMC6014565</span></a>] [<a href="https://pubmed.ncbi.nlm.nih.gov/29946199" ref="pagearea=cite-ref&targetsite=entrez&targetcat=link&targettype=pubmed">PubMed<span class="bk_prnt">: 29946199</span></a>]</div></dd><dt>8.</dt><dd><div class="bk_ref" id="article-28651.r8">Harrison AK, Flatow EL. Subacromial impingement syndrome. <span><span class="ref-journal">J Am Acad Orthop Surg. </span>2011 Nov;<span class="ref-vol">19</span>(11):701-8.</span> [<a href="https://pubmed.ncbi.nlm.nih.gov/22052646" ref="pagearea=cite-ref&targetsite=entrez&targetcat=link&targettype=pubmed">PubMed<span class="bk_prnt">: 22052646</span></a>]</div></dd><dt>9.</dt><dd><div class="bk_ref" id="article-28651.r9">Gelber JD, Soloff L, Schickendantz MS. The Thrower's Shoulder. <span><span class="ref-journal">J Am Acad Orthop Surg. </span>2018 Mar 15;<span class="ref-vol">26</span>(6):204-213.</span> [<a href="https://pubmed.ncbi.nlm.nih.gov/29443703" ref="pagearea=cite-ref&targetsite=entrez&targetcat=link&targettype=pubmed">PubMed<span class="bk_prnt">: 29443703</span></a>]</div></dd><dt>10.</dt><dd><div class="bk_ref" id="article-28651.r10">Farfaras S, Sernert N, Rostgard Christensen L, Hallström EK, Kartus JT. Subacromial Decompression Yields a Better Clinical Outcome Than Therapy Alone: A Prospective Randomized Study of Patients With a Minimum 10-Year Follow-up. <span><span class="ref-journal">Am J Sports Med. </span>2018 May;<span class="ref-vol">46</span>(6):1397-1407.</span> [<a href="https://pubmed.ncbi.nlm.nih.gov/29543510" ref="pagearea=cite-ref&targetsite=entrez&targetcat=link&targettype=pubmed">PubMed<span class="bk_prnt">: 29543510</span></a>]</div></dd><dt>11.</dt><dd><div class="bk_ref" id="article-28651.r11">Tashjian RZ. AAOS clinical practice guideline: optimizing the management of rotator cuff problems. <span><span class="ref-journal">J Am Acad Orthop Surg. </span>2011 Jun;<span class="ref-vol">19</span>(6):380-3.</span> [<a href="https://pubmed.ncbi.nlm.nih.gov/21628649" ref="pagearea=cite-ref&targetsite=entrez&targetcat=link&targettype=pubmed">PubMed<span class="bk_prnt">: 21628649</span></a>]</div></dd></dl></div><div><dl class="temp-labeled-list small"><dt></dt><dd><div><p class="no_top_margin">
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<b>Disclosure: </b>Smita Maruvada declares no relevant financial relationships with ineligible companies.</p></div></dd><dt></dt><dd><div><p class="no_top_margin">
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<b>Disclosure: </b>Antonio Madrazo-Ibarra declares no relevant financial relationships with ineligible companies.</p></div></dd><dt></dt><dd><div><p class="no_top_margin">
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<b>Disclosure: </b>Matthew Varacallo declares no relevant financial relationships with ineligible companies.</p></div></dd></dl></div><div class="bk_prnt_sctn"><h2>Figures</h2><div class="whole_rhythm bk_prnt_obj bk_first_prnt_obj"><div id="article-28651.image.f1" class="figure bk_fig"><div class="graphic"><img src="/books/NBK441844/bin/Gray412.jpg" alt="Muscles and Fascia of the Shoulder" /></div><div class="caption"><p>Muscles and Fascia of the Shoulder. Henry Vandyke Carter, <a href="https://commons.wikimedia.org/w/index.php?search=gray+plate+412&title=Special:MediaSearch&go=Go&type=image" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">Public Domain</a>, via Wikimedia Commons</p></div></div></div><div class="whole_rhythm bk_prnt_obj"><div id="article-28651.image.f2" class="figure bk_fig"><div class="graphic"><img src="/books/NBK441844/bin/rotator__cuff__muscles__injury.jpg" alt="Rotator Cuff Muscles Anatomy" /></div><div class="caption"><p>Rotator Cuff Muscles Anatomy.  Nucleus Communications, <a href="https://commons.wikimedia.org/w/index.php?search=Nucleus+Communications&title=Special:MediaSearch&go=Go&type=image" ref="pagearea=body&targetsite=external&targetcat=link&targettype=uri">Public Domain</a>, via Wikimedia Commons</p></div></div></div><div class="whole_rhythm bk_prnt_obj"><div id="article-28651.image.f3" class="figure bk_fig"><div class="graphic"><img src="/books/NBK441844/bin/rotator__cuff__muscles.jpg" alt="Rotator Cuff Muscles" /></div><div class="caption"><p>Rotator Cuff Muscles. Contributed by O Chaigasame, MD</p></div></div></div><div class="whole_rhythm bk_prnt_obj"><div id="article-28651.image.f4" class="figure bk_fig"><div class="graphic"><img src="/books/NBK441844/bin/rotator__cuff__tear.jpg" alt="Rotator Cuff Tear" /></div><div class="caption"><p>Rotator Cuff Tear. Contributed by S Bhimji, MD</p></div></div></div></div></div></div>
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