Solomon Damtew, Atlaw Daniel, Gezahegn Habtamu
Anatomy Department, Madda Walabu University, Bale Goba, Ethiopia.
Physiology Department, Madda Walabu University, Bale Goba, Ethiopia.
Int Med Case Rep J. 2021 May 14;14:323-325. doi: 10.2147/IMCRJ.S311757. eCollection 2021.
Even though anatomical variations in the hand, involving muscles and their tendons are common, the majority of anomalous variations are asymptomatic throughout a lifetime. Such variations are commonly appreciated during surgical procedures involving the hand or during routine cadaver dissection. The index finger has two independent extensor tendons, and in some cases, has lower incidence of anomalous variations than other extensor tendons. We found muscular variant of extensor indicis proprius (EIP) during a cadaver dissection while teaching medical anatomy students at Addis Ababa University Black lion Specialized and Teaching Hospital, 2018. While dissecting of right hand of unknown age male cadaver, proper tendons attaching to the indicis finger are present and anomalous muscle, the so named extensor indicis brevis, was observed. The muscle originates from ulnar styloid process and inserted as a single tendon to the base of proximal phalanx of index finger. Attention is needed during surgical procedures like tendon reconstruction because anatomical variation of EIB may affect a surgical procedure.
尽管手部涉及肌肉及其肌腱的解剖变异很常见，但大多数异常变异在一生中都没有症状。这种变异通常在涉及手部的外科手术或常规尸体解剖过程中被发现。食指有两条独立的伸肌腱，在某些情况下，其异常变异的发生率低于其他伸肌腱。2018年，在亚的斯亚贝巴大学黑狮专科医院教授医学生解剖学时，我们在一次尸体解剖中发现了示指固有伸肌（EIP）的肌肉变异。在解剖一具年龄不详的男性尸体的右手时，发现了附着在示指上的正常肌腱，并观察到一块异常肌肉，即所谓的示指短伸肌。该肌肉起自尺骨茎突，以单条肌腱插入食指近节指骨基部。在进行肌腱重建等外科手术时需要注意，因为EIB的解剖变异可能会影响手术操作。
