2013, Number 2
Revista Cubana de Ortopedia y Traumatología 2013; 27 (2)
Anatomical description of the origin of flexor and pronator muscles in the medial humeral epicondyle
Vergara AE, Mauricio MD, Vela RF
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ABSTRACTIntroduction: medial epicondylitis is fewer incidences of lateral epicondylitis. The information of lateral epicondylitis has been extrapolated to medial epicondylitis. It is a pathology that involves the origin of the muscles of the medial elbow: Pronator teres, Flexor carpiradialis, palmarislongus, Flexor digitorumsuperficialis and Flexor carpiulnaris. The goal was to make an anatomical description of the origin of the muscles on the medial epicondyle, taking into consideration their relationship with the epicondyle and the ulnar nerve.
Methods: twenty elbows were dissected, identifying the origin of the Pronator teres, Flexor carpiradialis, Flexor digitorumsuperficialis and Flexor carpiulnaris. Conjoined tendon was identified, its relationship to the epicondyle and the ulnar nerve.
Results: we found an average area of 148.7 mm2 epicondyle. The area of origin of the tendon was 94.7 mm2. The length, width and thickness of the conjoined tendon were 4.2 mm, 1.7 mm and 1 mm respectively. It was found that the conjoint tendon is formed mostly by carpiradialis flexor tendon.
Conclusions: the Flexor carpiradialis formed largely tendinous component of the muscle-tendinous origin of the common Flexor and Pronator teres. These muscles had a V configuration by medial and Y by lateral. The ulnar nerve passed very close to the epicondyle and its alteration may be part of the symptoms of medial elbow pain. We believe that being eminently tendinous the Flexor carpiradialis, could be the main seat of pathological changes in medial epicondylitis.