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Research code: IR.GUMS.REC.1403.239
Ethics code: IR.GUMS.REC.1403.239
1- Neuroscience Research Center, Trauma Institute, Guilan University of Medical Sciences, Rasht, Iran, Department of Anatomy
2- Department of Anatomy, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
3- Neuroscience Research Center, Trauma Institute, Guilan University of Medical Sciences, Rasht, Iran
2- Department of Anatomy, School of Medicine, Guilan University of Medical Sciences, Rasht, Iran
3- Neuroscience Research Center, Trauma Institute, Guilan University of Medical Sciences, Rasht, Iran
Abstract: (18 Views)
Background: Variations of the plantaris muscle (PM), particularly the bilateral two-bellied type, are extremely rare. A precise understanding of the morphological characteristics of such variations is essential to prevent unintended complications during surgical procedures and to ensure accurate interpretation of imaging findings.
Objective: This report aims to describe and analyze the morphological features of a rare bilateral two-bellied variation of the PM identified during the anatomical dissection of a 48-year-old male cadaver, and to highlight its clinical relevance.
Methods: During a detailed anatomical dissection of the posterior aspect of the knee in both lower limbs, a PM with two distinct bellies was identified bilaterally. The anatomical relationships of these muscle bellies with the tibial nerve and popliteal artery were carefully examined.
Results: In both legs, the PM consisted of two separate bellies. The lateral belly originated from the lateral supracondylar line of the femur. It measured approximately 10 cm in length, while the medial belly arose from the medial joint capsule of the knee and was approximately 5 cm long. After following independent courses, the tendons of both bellies joined the Achilles tendon. The medial belly was located in close proximity to the tibial nerve and popliteal artery, and each belly received independent innervation.
Conclusion: Awareness of this rare variation is important for orthopedic surgeons, neurologists, and radiologists to facilitate accurate treatment planning, prevent neurovascular injury, and ensure proper interpretation of clinical imaging.
Objective: This report aims to describe and analyze the morphological features of a rare bilateral two-bellied variation of the PM identified during the anatomical dissection of a 48-year-old male cadaver, and to highlight its clinical relevance.
Methods: During a detailed anatomical dissection of the posterior aspect of the knee in both lower limbs, a PM with two distinct bellies was identified bilaterally. The anatomical relationships of these muscle bellies with the tibial nerve and popliteal artery were carefully examined.
Results: In both legs, the PM consisted of two separate bellies. The lateral belly originated from the lateral supracondylar line of the femur. It measured approximately 10 cm in length, while the medial belly arose from the medial joint capsule of the knee and was approximately 5 cm long. After following independent courses, the tendons of both bellies joined the Achilles tendon. The medial belly was located in close proximity to the tibial nerve and popliteal artery, and each belly received independent innervation.
Conclusion: Awareness of this rare variation is important for orthopedic surgeons, neurologists, and radiologists to facilitate accurate treatment planning, prevent neurovascular injury, and ensure proper interpretation of clinical imaging.
Keywords: Plantaris muscle, Bilateral double-bellied variation, Anatomical dissection, Popliteal region, Neurovascular structures
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