Al-saggaf Samar
Department of Anatomy, Faculty of Medicine, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia.
Folia Morphol (Warsz). 2003 May;62(2):147-55.
Reports that describe abnormalities of the muscles and tendons of the leg and foot are important with regard to understanding the function of the lower limb and correlating these abnormalities with the clinical aspects. Variations in the insertion of the extensor hallucis longus muscle were studied in 60 adult human cadavers. Three different patterns of insertion were noticed. Pattern I (65%): the extensor hallucis longus muscle had a single tendinous insertion on the dorsal aspect of the base of the distal phalanx of the big toe. Pattern II (26.67%): the muscle terminated in two tendons. Pattern III (8.33%): the muscle terminated in three tendinous slips. Various sites of insertion of the extensor hallucis longus muscle were recorded other than the dorsal aspect of the base of the distal phalanx of the big toe. These were the dorsal aspect of the base of the proximal phalanx of the big toe and the capsule of the first metatarso-phalangeal joint or a connection with the tendon of the extensor hallucis brevis. The frequency of occurrence of lateral deviation of the big toe at the metatarso-phalangeal joint (hallux valgus) was recorded. It is suggested that the presence of these variations in the insertion of the extensor hallucis longus muscle may have a role in explaining its association with hallux valgus.
描述腿部和足部肌肉及肌腱异常的报告对于理解下肢功能以及将这些异常与临床情况相关联非常重要。在60具成年人体尸体上研究了拇长伸肌止点的变异情况。发现了三种不同的止点模式。模式I（65%）：拇长伸肌在拇趾远节趾骨基底背侧有单一腱性止点。模式II（26.67%）：该肌以两条肌腱止点。模式III（8.33%）：该肌以三条腱束止点。除了拇趾远节趾骨基底背侧外，还记录了拇长伸肌的其他止点部位。这些部位是拇趾近节趾骨基底背侧、第一跖趾关节囊或与拇短伸肌腱的连接。记录了拇趾在跖趾关节处外侧偏斜（拇外翻）的发生频率。提示拇长伸肌止点的这些变异可能在解释其与拇外翻的关联中起作用。
