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2019 | 78 | 2 |
Tytuł artykułu

Accessory head of the flexor pollicis longus muscle: anatomical study and clinical significance

Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Background: The accessory head of the flexor pollicis longus (AHFPL) has an oblique trajectory from medial to lateral aspect of the forearm below the flexor digitorum superficialis muscle and then joins the flexor pollicis longus muscle. When the anterior interosseous nerve (AIN) courses underneath the muscle belly of the AHFPL an entrapment neuropathy may occur, known as anterior interosseous nerve syndrome (AINS). Materials and methods: This descriptive cross-sectional study evaluated 106 fresh upper extremities. When the AHFPL was present, its fascicle was traced up to evaluate the origin site. The morphometric variables were measured using a digital micrometre (Mitutoyo, Japan). The relationship between the AHFLP and the AIN was evaluated. Results: The AHFPL was found in 34 (32.1%) of the 106 forearms. The AHFPL arose from the flexor digitorum superficialis muscle in 16 (47.1%) forearms, the medial epicondyle of the humerus in 10 (29.4%) forearms and the coronoid process of ulna in 8 (23.5%) forearms. The average total length of the AHFPL was 94.11 ± 10.33 mm. The AIN was located lateral to the AHFPL in 3 (8.8%) forearms, posterolateral in 7 (20.6%) forearms and posterior in 24 (70.6%) forearms. Conclusions: This study performed in a South American population sample revealed a prevalence of the AHFPL in a lower range compared to previous studies in North Americans and Asians. The AIN coursed more frequently underneath the muscle belly of AHFPL. This finding has clinical significance in the onset of the AINS and the subsequent surgical procedure for the AIN decompression. (Folia Morphol 2019; 78, 2: 394–400)
Słowa kluczowe
EN
Wydawca
-
Czasopismo
Rocznik
Tom
78
Numer
2
Opis fizyczny
p.394–400,fig.,ref.
Twórcy
  • Department of Basic Sciences, Faculty of Medicine, Industrial University of Santander. Cra. 32 #29-31, Bucaramanga, Colombia
autor
  • Department of Pathology, Industrial University of Santander. Bucaramanga, Colombia
  • Department of Basic Sciences, Faculty of Medicine, Industrial University of Santander. Cra. 32 #29-31, Bucaramanga, Colombia
Bibliografia
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Bibliografia
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