IJAR.2017.397

Type of Article:  Original Research

Volume 5; Issue 4.2 (November 2017)

Page No.: 4566-4569

DOI: https://dx.doi.org/10.16965/ijar.2017.397

BILATERAL DOUBLE BELLIES OF ABDUCTOR POLLICIS LONGUS

Gargi Soni *1, B Ravindra Kumar 2a,2b.

*1 Head, Department of Anatomy, International Medical School, Management & Science University, Malaysia.

2a, Former Lecturer, Department of Anatomy, International Medical School, Management & Science University, Malaysia.

2b Research Scholar, Department of Anatomy, Sri Padmavathi Medical College for Women, SVIMS University, Tirupati, Andhra Pradesh, India.

Address for Correspondence: Dr. Gargi Soni, Head, Department of Anatomy, International Medical School, Management & Science University, Malaysia. E-Mail: bhasingargi@rediffmail.com

ABSTRACT 

Introduction: The variations in the insertion and number of tendons of abductor pollicis longus are very common and have been highlighted by many researchers, but the variations in the origin of abductor pollicis longus (APL) have not received much attention.

Materials: During the routine dissection of 12 upper limbs from six cadavers in the Management and Science University, Malaysia, bilateral double bellies at origin of abductor pollicis longus were found in ten limbs and in all twelve limbs a double tendon of abductor pollicis longus was found. The additional muscle bellies in all the cases arose from the lateral aspect of the distal portion of abductor pollicis longus muscle. The lateral tendon, lying adjacent to the extensor pollicis brevis tendon, was considered the main apl tendon, while the medial tendons were regarded as accessory ones.

Observations: The lateral tendons were inserted into the base of the first metacarpal bone; to its anterolateral surface in 8 limbs and on its lateral surface in 4 limbs. The medial accessory tendons of the APL had different sites of insertions at: the anterolateral surface of base of 1st metacarpal bone in 8 limbs and on trapezium in four limbs.

Conclusion: The knowledge of presence of accessory tendons of APL is important for the hand surgeon not only to prevent unintentional injuries but also to be able to use these accessory tendons as grafting material and also the accessory tendons of APL contribute to the development of de quervain’s tenosynovitis.

Key words: Abductor Pollicis, Double tendons, Double Bellies.

REFERENCES

  1. Lacey T, 2nd, Goldstein La, Tobin Ce. Anatomical and clinical study of the variations in the insertions of the abductor pollices longus tendon, associated with stenosing tendovaginitis. J bone joint surg am. 1951; 33-a: 347–50.
  2. Rousset P, Vuillemin-Bodaghi V, Laredo Jd, Parlier-Cuau C. Anatomic variations in the first extensor compartment of the wrist: accuracy of us.  2010; 257:427–33.
  3. Choi Sj, Ahn Jh, Lee Yj, Ryu Ds, Lee Jh, Jung Sm, Et Al. De quervain disease: us identification of anatomic variations in the first extensor compartment with an emphasis on subcompartmentalization.  2011; 260:480–6.
  4. Coleman Ss, Mcafee Dk, Anson Bj. The insertion of the abductor pollicis longus muscle; an anatomical study of 175 specimens. Q bull northwest univ med sch. 1953; 27:117–22.
  5. Dhuria R, Mehta V, Suri Rk, Rath G. Anomalous composition of musculature of the first dorsal fibro-osseous compartment of the wrist. Singapore med j. 2012;53:e133–5.
  6. Nayak Sr, Krishnamurthy A, Pai Mm, et al. Multiple variations of the extensor tendons of the forearm. Rom j of morpho and embryol. 2008;49:97–100.
  7. Akan M, Gideroglu K, Cakir B. Multiple tendons of the abductor pollicis longus muscle. Hand surg. 2002; 7:289–91.
  8. Mehta V, Arora J, Suri Rk, Rath G. A rare quadruplicate arrangement of abductor pollicis longus tendons: anatomical clinical orthopaedics and related research.and clinical relevance. Clinics (sao paulo) 2009;64:153–5.
  9. Fabrizio Pa, Clemente Fr. A variation in the organization of abductor pollicis longus. Clin anat. 1996; 9:371–5.
  10. Bravo E, Barco R, Bullón A. Anatomic study of the abductor pollicis longus: a source for grafting material of the hand.  2010;468(5):1305-1309. Doi:10.1007/s11999-009-1059-4.
  11. Rao Mk, 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;39:141-7.
  12. Sookur Pa, Naraghi Am, Bleakney Rr, Jalan R, Chan O, White Lm. Accessory muscles: anatomy, symptoms, and radiologic evaluation. Radiographics, 2008;28:481-499.
  13. El-Beshbishy Ra, Abdel-Hamid Ga. Variations of the abductor pollicis longus tendon: an anatomic study. Folia morphol (warsz) .2013; 72:161–6.
  14. Roy Aj, Roy An, De C, Banerji D, Das S, Chatterjee B, et al. A cadaveric study of the first dorsal compartment of the wrist and its content tendons: anatomical variations in the indian population. J hand microsurg. 2012; 4:55–9.
  15. Tewari J, Mishra Pr, Tripathy Sk. Anatomical variation of abductor pollicis longus in indian population: a cadaveric study. Indian j orthop. 2015; 49:549–53.
  16. Thwin SS, Zaini F, Than M. Multiple variations of the tendons of the anatomical snuffbox. Singapore medical journal. 2014;55(1):37-40. Doi:10.11622/smedj.2013216.

Cite this article: Gargi Soni, B Ravindra Kumar. BILATERAL DOUBLE BELLIES OF ABDUCTOR POLLICIS LONGUS. Int J Anat Res 2017;5(4.2):4566-4569. DOI: 10.16965/ijar.2017.397