An Accessory Muscle of the Posterior Compartment of Leg of Clinical Significance: A Cadaveric Case Report

SUMMARY: Accessory and anomalous muscles are common in humans, although their unique morphologic characteristics can make accurate identification difficult. In this case report, we attempt to identify an anomalous accessory muscle of the posterior compartment of the leg [Compartimentum posterius cru...

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Autores principales:	Maggard,J, Zarbock,T, Jorgensen,M
Lenguaje:	English
Publicado:	Sociedad Chilena de Anatomía 2021
Materias:	Human gastrocnemius tertius Accessory head of gastrocnemius Plantaris Accessory plantaris
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022021000401054
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spelling	oai:scielo:S0717-950220210004010542021-08-16An Accessory Muscle of the Posterior Compartment of Leg of Clinical Significance: A Cadaveric Case ReportMaggard,JZarbock,TJorgensen,M Human gastrocnemius tertius Accessory head of gastrocnemius Plantaris Accessory plantaris SUMMARY: Accessory and anomalous muscles are common in humans, although their unique morphologic characteristics can make accurate identification difficult. In this case report, we attempt to identify an anomalous accessory muscle of the posterior compartment of the leg [Compartimentum posterius cruris] detected during cadaveric dissection and discuss its clinical significance. The muscle was found on the right lower limb of an 81-year-old female cadaver and extended from the distal femur to attach to the gastrocnemius muscle at the point where the medial and lateral heads fuse. At its origin, the muscle was found lateral to the popliteal vessels and crossed posterior to these vessels and tibial nerve. It displayed characteristics similar to both an accessory plantaris muscle and gastrocnemius tertius, thus making its ultimate identification difficult. Though the muscle displayed a morphologically similar appearance to the plantaris, we suggest that its common insertion with the gastrocnemius best identifies it as a gastrocnemius tertius. In addition, due to its relationship with the popliteal neurovasculature, it is possible that this muscle could have resulted in neurovascular entrapment although it is unknown whether or not this cadaver exhibited symptoms.info:eu-repo/semantics/openAccessSociedad Chilena de AnatomíaInternational Journal of Morphology v.39 n.4 20212021-08-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022021000401054en10.4067/S0717-95022021000401054
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Human gastrocnemius tertius Accessory head of gastrocnemius Plantaris Accessory plantaris
spellingShingle	Human gastrocnemius tertius Accessory head of gastrocnemius Plantaris Accessory plantaris Maggard,J Zarbock,T Jorgensen,M An Accessory Muscle of the Posterior Compartment of Leg of Clinical Significance: A Cadaveric Case Report
description	SUMMARY: Accessory and anomalous muscles are common in humans, although their unique morphologic characteristics can make accurate identification difficult. In this case report, we attempt to identify an anomalous accessory muscle of the posterior compartment of the leg [Compartimentum posterius cruris] detected during cadaveric dissection and discuss its clinical significance. The muscle was found on the right lower limb of an 81-year-old female cadaver and extended from the distal femur to attach to the gastrocnemius muscle at the point where the medial and lateral heads fuse. At its origin, the muscle was found lateral to the popliteal vessels and crossed posterior to these vessels and tibial nerve. It displayed characteristics similar to both an accessory plantaris muscle and gastrocnemius tertius, thus making its ultimate identification difficult. Though the muscle displayed a morphologically similar appearance to the plantaris, we suggest that its common insertion with the gastrocnemius best identifies it as a gastrocnemius tertius. In addition, due to its relationship with the popliteal neurovasculature, it is possible that this muscle could have resulted in neurovascular entrapment although it is unknown whether or not this cadaver exhibited symptoms.
author	Maggard,J Zarbock,T Jorgensen,M
author_facet	Maggard,J Zarbock,T Jorgensen,M
author_sort	Maggard,J
title	An Accessory Muscle of the Posterior Compartment of Leg of Clinical Significance: A Cadaveric Case Report
title_short	An Accessory Muscle of the Posterior Compartment of Leg of Clinical Significance: A Cadaveric Case Report
title_full	An Accessory Muscle of the Posterior Compartment of Leg of Clinical Significance: A Cadaveric Case Report
title_fullStr	An Accessory Muscle of the Posterior Compartment of Leg of Clinical Significance: A Cadaveric Case Report
title_full_unstemmed	An Accessory Muscle of the Posterior Compartment of Leg of Clinical Significance: A Cadaveric Case Report
title_sort	accessory muscle of the posterior compartment of leg of clinical significance: a cadaveric case report
publisher	Sociedad Chilena de Anatomía
publishDate	2021
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022021000401054
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An Accessory Muscle of the Posterior Compartment of Leg of Clinical Significance: A Cadaveric Case Report

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