Anatomical Features of the Extensors to the Index Finger

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Bilge O. , Govsa F., Pinar Y. , Celik S.

TURKIYE KLINIKLERI TIP BILIMLERI DERGISI, cilt.30, ss.1779-0, 2010 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 30 Konu: 6
  • Basım Tarihi: 2010
  • Doi Numarası: 10.5336/medsci.2009-13241
  • Sayfa Sayıları: ss.1779-0


Objective: Extensor indicis proprius (EIP), the extensor medii proprius (EMP) and the extensor indicis medii proprius (EIMP) are important tendons in the surgery of hand as a graft, apart from performing the function of extension. In cases which require surgical treatment of the hand like trauma, rheumatoid arthritis, ulnar nerve palsy, and hypoplasia of the thenar muscle, the EIP, the EMP and the EIMP are suitable muscles for tendon transfer operations. Material and Methods: The variations of the extensor tendons to the index finger were examined in fifty-four dissected hands. Results: The most common pattern of the tendons was a single extensor digitorum indicis (ED-indicis) and a single EIP. The EIP was observed as a single tendon in 87.03% of the specimens, and as a double tendon in 12.96% of them. The EMP was seen in 24.07% of the specimens. In one hand, the muscle had a shared belly with the EMP and the EIMP. Conclusion: The existence of the supernumerary tendons was more frequently encountered at the ulnar side of the ED-indicis than at the radial side. These extra tendons may be of great value in cases of traumatized hands which require tendinoplasty.