Deep transverse perineal muscle

Changed by Daniel J Bell, 27 Dec 2020

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The paired deep transverse perineal muscles (TA: musculus transversus profundus perinei) lie in the perineum and are important for stabilising the perineal body.

Summary

origin: ischial ramus
insertion: the fibres of each muscle meet in the midline at the perineal body and decussate to intertwine with their contralateral superficial transverse perineal muscle ^2,3
innervation: perineal nerve, a branch of the pudendal nerve
action:aid in the stability of the perineal body

For many years it was thought that each of the paired deep transverse perineal muscles inserted into one side of the perineal body but in the 21st century it was shown that the anatomy of their fibres is more complex and they interlink at the perineal body with the fibres of their counterpart muscle on the other side. Indeed no insertion into the perineal body actually occurs ^2,3.

~~-<strong>origin</strong>: <a title="Ischium" href="/articles/ischium">ischial ramus</a>~~
+<strong>origin</strong>: <a href="/articles/ischium">ischial ramus</a>
-</ul><p>For many years it was thought that each of the paired deep transverse perineal muscles inserted into one side of the perineal body but in the 21st century it was shown that the anatomy of their fibres is more complex and they interlink at the perineal body with the fibres of their counterpart muscle on the other side. Indeed no insertion into the perineal body actually occurs <sup>2,3</sup>.</p><h4>See also</h4><ul><li><a title="Superficial transverse perineal muscle" href="/articles/superficial-transverse-perineal-muscle">superficial transverse perineal muscles</a></li></ul>
+</ul><p>For many years it was thought that each of the paired deep transverse perineal muscles inserted into one side of the perineal body but in the 21st century it was shown that the anatomy of their fibres is more complex and they interlink at the perineal body with the fibres of their counterpart muscle on the other side. Indeed no insertion into the perineal body actually occurs <sup>2,3</sup>.</p><h4>See also</h4><ul><li><a href="/articles/superficial-transverse-perineal-muscle">superficial transverse perineal muscles</a></li></ul>

References changed:

1. Chummy S. Sinnatamby. Last's Anatomy. (2020) <a href="https://books.google.co.uk/books?vid=ISBN9780702033957">ISBN: 9780702033957</a><span class="ref_v4"></span>
2. Zifan A, Reisert M, Sinha S, Ledgerwood-Lee M, Cory E, Sah R, Mittal RK. Connectivity of the Superficial Muscles of the Human Perineum: A Diffusion Tensor Imaging-Based Global Tractography Study. (2018) Scientific reports. 8 (1): 17867. <a href="https://doi.org/10.1038/s41598-018-36099-4">doi:10.1038/s41598-018-36099-4</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/30552351">Pubmed</a> <span class="ref_v4"></span>
3. Shafik A, Sibai OE, Shafik AA, Shafik IA. A novel concept for the surgical anatomy of the perineal body. (2007) Diseases of the colon and rectum. 50 (12): 2120-5. <a href="https://doi.org/10.1007/s10350-007-9064-8">doi:10.1007/s10350-007-9064-8</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/17909903">Pubmed</a> <span class="ref_v4"></span>

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