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IJAR.2017.385

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Type of Article:  Original Research

Volume 5; Issue 4.1 (October 2017)

Page No.: 4504-4509

DOI: https://dx.doi.org/10.16965/ijar.2017.385

STUDY OF VARIATIONS IN THE EXTENSOR TENDONS OF FOREARM AND HAND

Esther Yamuna  N 1, Dhanalakshmi  V *2, Ganga N V 3.

1 Assistant Professor, Department of Anatomy, Govt. Thoothukudi Medical College, Thoothukudi, Tamilnadu, India.

*2 Associate Professor, Department of Anatomy, Govt. Thoothukudi Medical College, Thoothukudi, Tamilnadu, India.

3 Assistant Professor, Department of Anatomy, Govt. Thoothukudi Medical College, Thoothukudi, Tamilnadu, India.

Corresponding Author: Dr. Dhanalakshmi  V, Associate Professor, Department Of Anatomy, Govt. Thoothukudi Medical College, Thoothukudi, Tamilnadu, India. Mobile: 9443671671 E-Mail: drlakshmidhana@gmail.com

ABSTRACT

Study of extensor tendons in forearm, dorsum of hand and their intertendinous connections was conducted in 70 upper limbs (35 right and 35 left) from Govt. Thoothukudi Medical College, Tamilnadu, India. Variations in the extensor tendons of fingers, both proximal and distal to the extensor retinaculum were analyzed.  The arrangement of extensor pollicis longus and brevis tendons were traced up to base of proximal phalanx and extensor expansion at the level of proximal as well as base of phalanx, they were found to be single or doubled. Extensor indicis were single tendon in most of the specimens.  The extensor digitorum gave off single tendon to the index finger, double tendons to the middle finger and triple tendons to the ring finger.  The extensor digiti minimi often had single or double tendon to the little finger distal to extensor retinaculum, in those cases contribution from the extensor digitorum tendon slip to the little finger were absent. Three types of juncturae tendinum were identified between the tendons of extensor digitorum in the 2nd, 3rd, 4th inter metacarpal spaces of hands.  The extensor indicis tendon was always observed to lack juncturae tendinum. Type I juncturae tendinum was seen in the 1st inter metacarpal space.  Type II was seen in the 3rd intermetacarpal space.  Type III was identified in the 4th intermetacarpal space.  Knowledge of these variations may help surgeons while performing tendon repair or transfer. Surgeons should keep in mind about the existence of these variations for better diagnosis and reconstructive procedures.

KEYWORDS:  Extensor Digitorum Tendon, Extensor Indicis, Extensor Digiti Minimi, Juncturae Tendinum, Variations.

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Cite this article: Esther Yamuna N, Dhanalakshmi V, Ganga N V. STUDY OF VARIATIONS IN THE EXTENSOR TENDONS OF FOREARM AND HAND. Int J Anat Res 2017;5(4.1):4505-4509. DOI: 10.16965/ijar.2017.385