Anconeus epitrochlearis muscle
Updates to Article Attributes
Anconeus epitrochlearis is aan accessory muscle in the forearm. It canis also known as the accessory anconeus muscle and should not be asymtomatic or symtomatic when there is compression ofconfused with the ulnar nerve within the cubital tunnel, leading to ulnar neuritisanconeus muscle.
Epidemiology
The muscle may be unilateral but has been found to be bilateral in one of four patients with cubital tunnel syndrome 2. It is present in ~15% (range 3-28%) of the population 3.
Clinical presentation
It can be asymptomatic or symptomatic when there is compression of the ulnar nerve within the cubital tunnel, leading to ulnar neuritis.
Gross anatomy
- origin: olecranon
- insertion: medial epicondyle
Forms the roof of the cubital tunnel when present.
Radiographic features
MRI
Axial MR images may demonstrate a mass superficial to the cubital tunnel, where there should normally only be fat.
-<p><strong>Anconeus epitrochlearis</strong> is a muscle in the forearm. It can be asymtomatic or symtomatic when there is <span id="ctl00_ContentPlaceHolder1_ctl00_lblExplanation">compression of the ulnar nerve within the cubital tunnel, leading to ulnar neuritis.</span></p><h4><span>Epidemiology</span></h4><p>The muscle may be unilateral has been found to be bilateral in one of four patients with <a title="Cubital tunnel syndrome" href="/articles/cubital-tunnel-syndrome">cubital tunnel syndrome</a> <sup>2</sup>.</p><h4><span id="ctl00_ContentPlaceHolder1_ctl00_lblExplanation">Radiographic features</span></h4><h5><span id="ctl00_ContentPlaceHolder1_ctl00_lblExplanation">MRI</span></h5><p><span id="ctl00_ContentPlaceHolder1_ctl00_lblExplanation"></span>Axial MR images may demonstrate a mass superficial to the cubital tunnel, where there should normally only be fat. <span id="ctl00_ContentPlaceHolder1_ctl00_rprCorrectNotCheckedAnswers_ctl01_lbAnswerText"></span></p>- +<p><strong>Anconeus epitrochlearis</strong> is an accessory muscle in the forearm. It is also known as the <strong>accessory anconeus muscle</strong> and should not be confused with the <a href="/articles/anconeus">anconeus muscle</a>. </p><h4>Epidemiology</h4><p>The muscle may be unilateral but has been found to be bilateral in one of four patients with <a href="/articles/cubital-tunnel-syndrome">cubital tunnel syndrome</a> <sup>2</sup>. It is present in ~15% (range 3-28%) of the population <sup>3</sup>. </p><h4>Clinical presentation</h4><p>It can be asymptomatic or symptomatic when there is compression of the <a href="/articles/ulnar-nerve">ulnar nerve</a> within the <a href="/articles/cubital-tunnel">cubital tunnel</a>, leading to ulnar neuritis.</p><h4>Gross anatomy</h4><ul>
- +<li>
- +<strong>origin:</strong> olecranon</li>
- +<li>
- +<strong>insertion:</strong> medial epicondyle</li>
- +</ul><p>Forms the roof of the <a href="/articles/cubital-tunnel">cubital tunnel</a> when present. </p><h4>Radiographic features</h4><h5>MRI</h5><p>Axial MR images may demonstrate a mass superficial to the cubital tunnel, where there should normally only be fat.</p>
References changed:
- 3. Stein JM, Cook TS, Simonson S et-al. Normal and variant anatomy of the elbow on magnetic resonance imaging. Magn Reson Imaging Clin N Am. 2011;19 (3): 609-19. <a href="http://dx.doi.org/10.1016/j.mric.2011.05.002">doi:10.1016/j.mric.2011.05.002</a> - <a href="http://www.ncbi.nlm.nih.gov/pubmed/21816334">Pubmed citation</a><span class="auto"></span>
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