Third head of biceps femoris muscle-a case report

Surajit Ghatak, Sonali Adole, Debajani Deka, Muhamed Faizal


Sometimes variations in biceps femoris may be noticed like an accessory head of biceps femoris. Here during routine cadaveric dissection in the department of anatomy. All India institute of medical sciences, Jodhpur we found a case with an accessory head of biceps femoris in both the lower limbs. The muscle belly is originating from the fibers of long head of biceps femoris and going downward medially to get inserted to the medial condyle of tibia on its medial superior aspect. On the right-side insertion site is like a sheath and on half a way it is merging with medial intermuscular septum of thigh. On the left side insertion is first like a thin sheath and then a thin muscle belly. The muscle belly is thin as compared to the long and short head of the main muscle bellies. On the left side thickness is around 3.7 mm in the upper end and thinner in the lower end while on right side also it is around 3.75 mm. On right side length of muscle belly is around 5 cm and on left side it is around 5.5 cm muscle belly, then becomes a sheath with length around 0.5 mm and then again becomes a muscle belly of around 3.5 cm length. Short head is arising high up on the left side while on right side it is as normal.


Biceps, Tibia, Fibula, Muscle, Accessory, Nerve, Flexed, Knee, Hip

Full Text:



Available at: Accessed on 12 Dec 2020.

Kubo K, Tsunoda N, Kanehisa H, Fukunaga T. Activation of agonist and antagonist muscles at different joint angles during maximal isometric efforts. Eur J appl physiol. 2004;91:349-52.

Strasser R, Wein MT, Wieder M, Erhardt J, Kaufmann J. Biceps Femoris Injury a Rarity: A Case Report. Surg J. 2017;3(3):e143-e4.

Fritsch BA, Haskar VM. Anomalous biceps femoris tendon insertion leading to a snapping knee in a young male. Knee Surg Relat Res. 2017;29(2):144-9.

Available at: Accessed on 12 Dec 2020.

Sutton G. Hamstrung by Hamstring Strains: A Review of the Literature. JOSPT. 1984;5(4):184-95.

Radonic V, Koplic S, Giunio L, Božic I, Maškovic J, Buca J. Popliteal artery entrapment syndrome. Tex Heart Ins J. 2000;27(1):3-13.

Berihu BA, Debeb YG. Anatomical variation in bifurcation and trifurcations of sciatic nerve and its clinical implications: in selected university in Ethiopia. BMC Res Notes. 2015;8:633.

Cetkin M, Yoruk MD, Golpinar M, Dinc M, Pinar Y. An anomalous muscular bundle connecting biceps femoris to semitendinosus. MOJ Anatomy Physiol. 2017;4(3):311-3.

Chakravarthi KK. Unususal unilateral multiple muscular variations of back of thigh. Chakravarthi K. Unusual unilateral multiple muscular variations of back of thigh. Ann Med Health Sci Res. 2013;3(1):S1-2.

Rajendiran R, Murugesan A. Unilateral tensor fascia suralis: a case report. Brunei darussalam J health. 2016;6(2):94-8.

Fritsch BA, Mhaskar V. Anomalous Biceps Femoris Tendon Insertion Leading to a Snapping Knee in a Young Male. Knee Surg Relat Res. 2017;29(2):144-9.

Sowmya S, Meenakshi P, Sharmada KL, Sujana M. Bilateral anomalous muscle in the popliteal fossa and its clinical significance. Int J Anatomy Res. 2014;2(4):614-6.

Bang JH, Gil YC, Yang HJ, Jin JD, Lee JH, Lee HY. Multiple Muscular Variations in the Neck, Upper Extremity, and Lower Extremity Biased toward the Left Side of a Single Cadaver. J Korean Med Sci. 2015;30:502-5.