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Year :2019
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Month :
March-April
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Volume :
8
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Issue :
2
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Page :
AO17 - AO21
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Morphology of Extensor Indicis Proprius Muscle in the North Indian Region: An Anatomic Study with Ontogenic and Phylogenetic Perspective
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Correspondence Address :
Meenakshi Khullar, Sherry Sharma,
Dr. Meenakshi Khullar,
H. No. 43 Vikas Vihar (Phase 1) Ferozepur City-152002, Punjab, India.
E-mail: meenakshikhullar8@gmail.com
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Introduction: Introduction: Variants on muscles and tendons of the forearm or hand occur frequently in human beings. They are often discovered during routine educational cadaveric dissections and surgical procedures.
Aim: To observe any variation of Extensor Indicis Proprius (EIP) muscle and to document any accessory muscles or tendons related to the index finger.
Materials and Methods: The EIP muscle was dissected in 60 upper limb specimens. After reflection of the skin and superficial fascia from the back of the forearm and hand, the extensor retinaculum was divided longitudinally and the dorsum of the hand was diligently dissected. The extensor tendons were delineated and followed to their insertions. Variations in the tendons of EIP and accessory muscles or tendons with respect to the index finger were noted and appropriate photographs were taken.
Results: In two limbs, the EIP muscle was altogether absent. In all the remaining 58 limbs, the origin of EIP was from the posterior surface of the distal third of the ulnar shaft. Out of these 58 limbs, this muscle had a single tendon of insertion in 52 limbs, whereas in the remaining six limbs it had two tendinous slips with different insertions.
Conclusion: Knowledge of the various normal as well as anomalous tendons on the dorsal aspect of the hand is necessary for evaluating an injured or diseased hand and also at the time of tendon repair or transfer. Awareness of such variants becomes significant in surgeries in order to avoid damage to the adjacent neurovascular structures.
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