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CC BY-NC-ND 4.0 · Journal of Health and Allied Sciences NU 2016; 06(01): 085-087
DOI: 10.1055/s-0040-1708625
Case Report

Additional Muscle Belly and Abberant Muscle Fibers over the Extensor Retinaculam of Wrist

Divia Paul A.
1   Junior Research Fellow, Department of Anatomy, Yenepoya Medical College, Mangalore, Karnataka, Bhubaneswar - 751019, Odisha, India
,
Manisha Rajanand Gaikwad
2   HOD, Department of Anatomy, All India Institute of Medical Sciences, Bhubaneswar - 751019, Odisha, India
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Abstract

Variations in the extensor compartment of forearm are common and are significant to neurologists, surgeons and anatomists. The present case report describes a well-developed muscle belly medial to the tendons of extensor carpi radialis longus and extensor carpi radialis brevis. Muscle belly is originating from common extensor origin on lateral epicondyle and is inserted to base of third metacarpal; bilaterally. In addition to this, aberrant muscle fibres packed in a common connective tissue bundle over the dorsal digital expansion of left hand were also found. The above observations were noted during routine dissection of a 50 year old Indian male cadaver. The variant muscle having common extensor origin and muscle fibres over dorsal digital expansion were identified and protected. The blood supply and nerve supply were noted. The clinical significance of the variation is explained in detail.

Keywords:

Extensor muscles of forearm - Dorsal digital expansion - Common extensor origin - Aberrant muscle fibres


Publication History

Article published online:
22 April 2020

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  • References

  • 1 Chakravarthi KK. Unusual unilateral muscular variations of the flexor compartment of forearm and hand-A case report. Int J Med health sci. 2012; 1(3):93-8.
  • 2 Tan ST, Smith PJ. Anomalous extensor muscles of the hand: a review. J Hand Surg-Brit Eur. 1999; 24(3):449-55.
  • 3 Sawant SP. The cadaveric study of extensor carpi radialis longus muscle on the developmental basis. Int J Med Res Pharm Sci. 2013; 3(11):38- 42.
  • 4 Claassen H, Wree A. Multiple variations in the region of Mm. extensores carpi radialis longus and brevis. Ann Anat. 2002; 184(5):489-91.
  • 5 Jetti R, Nair V, Nair RV, Mookambika R, Somayaji K. Variant insertion of extensor carpi radialis longus in a South Indian cadaver. Int J Anat Var. 2010;3:86-7.
  • 6 Nayak SR, Vadgaonkar R, Krishnamurthy A, Prabhu LV. An anomalous muscle in the forearm extensor compartment. Clin J. 2009; 64(3):262-3.
  • 7 Hollinshead WH, Anatomy for Surgeons: The Back and Limbs. Harper and Row Publishers, New York. 1969; 3(2): pp.428-41.
  • 8 Rao M, Vollala VR, Bhat SM, Bolla S, Samuel VP, Pamidi N. Four cases of variations in the forearm extensor musculature in a study of hundred limbs and review of literature. Indian J Plast Surg. 2006; 39(2):141.
  • 9 Cankur NS, Ozdemir ST. Accessory slip of the extensor carpi radialis longus muscle. Gazi Med J. 2003; 14:197-99.
  • 10 Sukumaran TT, Mathew AJ. " Pozzi". Int J Anat Var. 2011; 4.
  • 11 Al-Qattan M. Two-staged extensor tendon reconstruction for zone 6 extensor tendon loss of the fingers: indications, technique and results. J Hand Surg Eur Vol. 2015; 40(3):276-80.
  • 12 Chetta MD, Ono S, Chung KC. Partial extensor carpi radialis longus turn-over tendon transfer for reconstruction of the extensor pollicis longus tendon in the rheumatoid hand: case report. J Hand Surg Am. 2012; 37(6):1217-20.
  • 13 Kerver AL1, Carati L, Eilers PH, Langezaal AC, Kleinrensink GJ, Walbeehm ET. An anatomical study of the ECRL and ECRB: feasibility of developing a preoperative test for evaluating the strength of the individual wrist extensors. J Plast Reconstr Aesthet Surg. 2013; 66(4):543-50.
  • 14 Edwards SG, Calandruccio JH. Autologous blood injections for refractory lateral epicondylitis. J Hand Surg Am. 2003; 28(2):272–278.