Morphology of the Posterior Interosseous Nerve with Regard to Entrapment Syndrome
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ORIGINAL ARTICLE
Morphology of the Posterior Interosseous Nerve with Regard to Entrapment Syndrome Gloria Maria Hohenberger1 · Angelika Maria Schwarz2 · Peter Grechenig3 · Marco Johannes Maier4 · Ulrike Schwarz3 · Sabine Kuchling1 · Axel Gänsslen5 · Andreas Heinrich Weiglein3 Received: 2 February 2020 / Accepted: 27 February 2020 / Published online: 14 March 2020 © Indian Orthopaedics Association 2020
Abstract Background Posterior interosseous nerve (PIN) entrapment syndrome is a rare condition and is predisposed by anatomical factors such as narrow passages through fibrous arcades; whereas, the Arcade of Frohse (AF) is the most common entrapment point. The aim of this study was to evaluate the entrance and exit points of the PIN into the supinator in detail. Materials and Methods One hundred unpaired upper extremities underwent dissection. The PIN’s entrance and exit points from the supinator were depicted. The distances between the tip of the radial head (RH) and the AF and the exit point of the PIN from the supinator were measured. Further, it was checked if the borders of the AF and the exit point were muscular, tendinous or a combination of these. Results The interval between the PIN’s entry into the supinator and the tip of the RH was at a mean of 28.9 mm. Concerning the border of the AF, in 54 cases a muscular and in 46 specimens a tendinous version could be observed. The interval between the exit point of the PIN and the tip of the RH proved to be at a mean of 64.2 mm. Further, the exit’s border was muscular in 65 specimens and tendinous in 35 cases. Conclusion During surgical treatment of the PIN syndrome, it needs to be kept in mind that approximately one-third of all patients might also suffer from entrapment at the exit point of the PIN. Keywords Posterior interosseous nerve · Posterior interosseous nerve syndrome · Arcade of Frohse · Supinator
Introduction Gloria Maria Hohenberger and Angelika Maria Schwarz have contributed equally to the work. Andreas Heinrich Weiglein: Deceased.
Peripheral nerve entrapment is a neuropathy resulting from structural abnormalities [1] and is most commonly seen in the upper extremity; whereas, the carpal tunnel syndrome
* Gloria Maria Hohenberger [email protected]
Andreas Heinrich Weiglein [email protected]
Angelika Maria Schwarz [email protected]
1
Peter Grechenig [email protected]
Department of Orthopaedics and Trauma, Medical University of Graz, Auenbruggerplatz 5, 8036 Graz, Austria
2
Marco Johannes Maier [email protected]
AUVA Trauma Hospital Styria I Graz, Göstinger Straße 24, 8020 Graz, Austria
3
Ulrike Schwarz [email protected]
Division of Macroscopic and Clinical Anatomy, Medical University of Graz, Harrachgasse 21, 8010 Graz, Austria
4
Vienna, Austria
5
Clinic for Trauma Surgery, Orthopedics and Hand Surgery, Klinikum Wolfsburg, Sauerbruchstraße 7, 38440 Wolfsburg, Germany
Sabine Kuchling [email protected] Axel Gänsslen axel.Gaensslen@Klin
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