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A very rare case report: accessory head of the sartorius muscle
Affiliations- Department of Anatomical Dissection and Donation, Medical University of Lodz, Poland
- Department of Anatomical Sciences, St. George’s University, Grenada, West Indies
- Department of Neurosurgery, Tulane University School of Medicine, New Orleans, Louisiana, United States
- Department of Neurology, Tulane University School of Medicine, New Orleans, Louisiana, United States
- Department of Structural and Cellular Biology, Tulane University School of Medicine, New Orleans, Louisiana, United States
- Department of Surgery, Tulane University School of Medicine, New Orleans, Louisiana, United States
- Department of Neurosurgery, Ochsner Medical Centre, New Orleans, Louisiana, United States
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Abstract
The sartorius muscle belongs to the anterior compartment of the thigh. Morphological variations of this muscle are very rare, few cases being described in the literature. An 88-year-old female cadaver was dissected routinely for research and teaching purposes. However, an interesting variation was found during anatomical dissection. The proximal part of the sartorius muscle had the normal course, but the distal part bifurcated into two muscle bellies. The additional head passed medially
to the standard head; thereafter, there was a muscular connection between them. This connection then passed into the tendinous distal attachment. It created a pes anserinus superficialis, which was located superficially to the distal attachments of the semitendinosus and gracilis muscles. This superficial layer was very wide and attached to the medial part of the tibial tuberosity and to the crural fascia. Importantly, two cutaneous branches of the saphenous nerve passed between the two heads. The two heads were innervated by separate muscular branches of the femoral nerve. Such morphological variability could be clinically important.
Abstract
The sartorius muscle belongs to the anterior compartment of the thigh. Morphological variations of this muscle are very rare, few cases being described in the literature. An 88-year-old female cadaver was dissected routinely for research and teaching purposes. However, an interesting variation was found during anatomical dissection. The proximal part of the sartorius muscle had the normal course, but the distal part bifurcated into two muscle bellies. The additional head passed medially
to the standard head; thereafter, there was a muscular connection between them. This connection then passed into the tendinous distal attachment. It created a pes anserinus superficialis, which was located superficially to the distal attachments of the semitendinosus and gracilis muscles. This superficial layer was very wide and attached to the medial part of the tibial tuberosity and to the crural fascia. Importantly, two cutaneous branches of the saphenous nerve passed between the two heads. The two heads were innervated by separate muscular branches of the femoral nerve. Such morphological variability could be clinically important.
Keywords
sartorius muscle, accessory head, morphological variation, case report, saphenous nerve entrapment syndrome, compression
About this articleTitle
A very rare case report: accessory head of the sartorius muscle
Journal
Issue
Vol 83, No 1 (2024): Folia Morphologica
Article type
Case report
Pages
244-249
Published online
2023-02-16
Page views
475
Article views/downloads
390
DOI
Pubmed
Bibliographic record
Folia Morphol 2024;83(1):244-249.
Keywords
sartorius muscle
accessory head
morphological variation
case report
saphenous nerve entrapment syndrome
compression
Authors
Nicol Zielinska
Richard Shane Tubbs
Adrian Balcerzak
Łukasz Olewnik
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