Type of Article:  Original Research

Volume 6; Issue 1.1 (January 2018)

Page No.: 4811-4814

DOI: https://dx.doi.org/10.16965/ijar.2017.472


Shalom Elsy Philip *1, Dakshayani K.R *2.

*1 Postgraduate, Department of Anatomy, Mysore medical college, Mysore, Karnataka, India.

2 Professor and Head, Department of Anatomy, Mysore medical college, Mysore, Karnataka, India.

Address for Correspondence: Dr. Shalom Elsy Philip, Postgraduate, Department of anatomy, Mysore medical college and research institute, Irwin road, Yadavagiri, Mysuru, Karnataka- 570001, India. E-Mail: tfcshalom@gmail.com


Background: Flexor digitorum profundus (FDP) is a deep flexor of forearm. The accessory heads of flexor pollicis longus(FPLah) and flexor digitorum profundus(FDPah) are named after Gantzer who described the same in 1831.The less frequent of the two is FDPah, which simulates soft tissue tumor mass or may cause compression neuropathy of anterior interosseous nerve leading to anterior interosseous nerve syndrome or Kiloh-Nevin syndrome.

Aim: To determine the prevalence and morphology of accessory head of flexor digitorum profundus.

Materials and Methods: 50 upper limbs of equal right and left distribution of unknown sex were dissected and examined in the department of anatomy. Morphological parameters such as shape, origin, insertion and relation to nerve of accessory head of FDP were studied.

Results: The prevalence of accessory head of FDP showed 22% .FDPah was most commonly seen on the left side. Most frequently observed shape for FDPah was fusiform and all the accessory heads originated from undersurface of flexor digitorum superficialis and majority of the cases were inserted to middle third of tendon of FDP for index finger. One of the cases had double muscle belly with their tendons inserting to tendon for index finger and middle finger of FDP.

Conclusion: Knowledge of existence of Gantzer’s muscle may provide surgeon with information for the differential diagnosis of the causes and sites of anterior interosseous nerve syndrome, also surgical interference for nerve decompression or to differentiate from soft tissue tumors.

KEY WORDS: Gantzer’s muscle, Flexor digitorum profundus, Anterior interosseous nerve.


  1. Standring S. The anatomical basis of clinical practice. In:Gray’s Anatomy. 40th ed. London: Elsevier Churchill Livingstone; 2008:847-848.
  2. Datta AK. Essentials of Human Anatomy. 4th Vol. 3. Kolkata: Current Books International; 2009:p71.
  3. Wood J. Variations in human myology. Proceedings of the Royal Society of London 1868; 16: 483–525.
  4. Parsonage M.J and TurnerJ.W.Neuralgic amyotrophy; the shoulder-girdle syndrome. The Lancet. 1948 Jun; 26(1): 973-8.
  5. Kiloh L.G, and S Nevin. Isolated neuritis of the anterior interosseous nerve. British Medical Journal.1952 Apr; 4763(1): 850-1.
  6. Lewis, W.H. (1910) The development of the muscular system. In: Keibel, F. and Mall, F.P., Eds., Manual of Human Embryology, J. B. Lippincott, Philadelphia, 492- 493.
  7. Jones, M., Abrahams, P.H. and Sanudo, J.R. Case report: Accessory head of the deep forearm flexors. J Anat. 1997; 191:313-314.
  8. El Domiaty MA, Zoair MM, Sheta AA. The prevalence of accessory heads of the flexor pollicis longus and the flexor digitorum profundus muscles in Egyptians and their relations to median and anterior interosseous nerves. Folia Morphol 2008; 67(1):63- 71.
  9. Jones M, Abrahams PH, Sanudo JR, Campillo M. Incidence and morphology of accessory heads of flexor pollicis longus and flexor digitorum profundus( Gantzer’s muscles). J Anat 1997; 191:451- 455.
  10. Mangini U. Flexor pollicis longus muscle its morphology and clinical significance. J Bone Joint Surg.1960; 42A: 467–470.
  11. Bharathi S, Sunitha N.S,Karpagajothi J. Study of Accessory Head of Flexor Pollicis Longus in South Indian Population. IOSR-JDMS.2017 May; 16(5):36-40.
  12. Kida M. The morphology of Gantzer’s muscle with special reference to the morphogenesis of the flexor digitorum superficialis. Kaibogaku-Zasshi.1988; 63: 539–546.
  13. Amrita K, Sanjay K, Jawed A, Ruchi R, Vinod K. Morphological Study of Accessory Heads of Deep Flexor Muscle of Forearm. 2017 Jul; 5(7): 25172-76.
  14. Bhavya B.S, Maheshwari M, Smitha M. Accessory head of Flexor Digitorum Profundus: A case study. Int J Anat Res 2016; 4(4):2931-35.
  15. Macalister A. Additional observations on muscular anomalies in human anatomy (3rd series), with a catalogue of the principal muscular variations hitherto published. Transactions of the Royal Irish Academy. 1875; 25:1–134.
  16. Gunnal, S.A., SIddiquI, A.U., Daimi, S.R. and Farooqui, M.S. A study on the accessory head of the flexor pollicis longus muscle (Gantzer’s muscle). Journal of Clinical and Diagnostic Research.2013;7(3):418-421.
  17. Hafez S.A. A report on the accessory head of Flexor Pollicis Longus and Variations of Forearm Musculature. J. Morphol. Sci. 2017;34(2):98-106.
  18. Ryu J, Watson HK. SMB Syndrome (symptomatic supernumerary muscle belly syndrome). Clin Orthop Relat Res.1987;216: 195-202.

Cite this article: Shalom Elsy Philip, Dakshayani K.R. A MORPHOLOGICAL STUDY OF A RARE VARIANT OF GANTZER’S MUSCLE. Int J Anat Res 2018;6(1.1):4811-4814. DOI: 10.16965/ijar.2017.472