Type of Article : Case Report
Year: 2014 | Volume 2 | Issue 4 | Page No. 777-780
Date of Publication: 31-12-2014
UNILATERAL VARIATION IN BICEPS BRACHII MUSCLE WITH FOUR HEADS
Garima Pardhi *1, Savita Gadekar 2.
*1 Assistant Professor Department of Anatomy, RKDF Medical College & Research Centre, Jatkhedi, Bhopal, Madhya Pradesh, India.
2 Assistant Professor Department of Anatomy, RKDF Medical College & Research Centre, Jatkhedi, Bhopal, Madhya Pradesh, India.
Address: Dr. Garima Pardhi, M-21, Sector 2A, Saket Nagar, Bhopal, Madhya Pradesh, India.
Biceps brachii is one of the muscles of the anterior compartment of the arm. Normally it has two heads; long head which originates from the supraglenoid tubercle of glenoid cavity and short head from the tip of coracoid process of scapula. During routine Anatomy dissection for first MBBS students, in an adult male cadaver aged approximately 65 years, a biceps brachii muscle with four heads was observed. The short and long heads had their normal origin. In addition to this third head was found to be originating obliquely from the shaft of the humerus along the lateral side of insertion of the coracobrachialis muscle and the fourth head originated from superomedial margin of origin of the brachialis muscle. Both additional heads were directed downwards and laterally and joined the deeper surface of short head. All heads of this variant biceps brachii muscle were supplied by the musculocutaneous nerve. Earlier, Poudel PP and Bhattarai C (2009) reported the presence of 3rd head in 6.2% and 4th head also in 6.2% where as Standring (2008) reported the presence of 3rd head in 10%. Knowledge of the existence of such variations of biceps brachii may be significant in surgeries of the arm in trauma, tumors, etc.
KEY WORDS: Biceps brachii, Heads, Musculocutaneous Nerve.
- Standring S, Borley NR, Collins P, Crossman AR, Gatzoulis MA, Healy JC,et al. Gray’s Anatomy: The anatomical basis of clinical practice. Churchill Livingstone 40th Ed. 2008; 825&826.
- Ilayperuma I, Nanayakkara G, Palahepitiya N. Incidence of humeral head of biceps brachii muscle – Anatomicalinsight. Int J Morphol 2011.29(1):221-225,
- Testut, L. &Latarjet, A. Compendio de anatomia descriptive. 22nd Ed. Buenos Aires, Salvat, 1981.
- AggarwalA, KaurH, SahniD, AggarwalA. Four-headed biceps brachii muscle with variant course of musculocutaneous nerve: anatomical and clinical insight. Internat J Anat Variations 2009;2: 127–130.
- Jadhav SD, Joshi SD, Joshi SS, Athavale SA. Extra Heads of Biceps Brachii. J AnatSocInd;54, No. 1 (2005-01 - 2005-03).
- Poudel PP, Bhattarai C. Study on the supernumerary heads of biceps brachii muscle in Nepalese. Nepal Med Coll J 2009;11(2):96-98.
- Sawant SP, Shaikh ST, MoreRM. Variant heads of biceps brachii muscle with clinical importance. IndJ Basic App Med Res 2012; 1(4):245-250.
- Avadhani R, Chakravarthi KK.A Study on morphology of the biceps brachii muscle. NUJHS 2012; 2(3): 1-5.
- Cricenti SV, Cardoso TL, Garcia AN, Faro PF, Vincenzo CS. Anatomic variation regarding number of heads of the brachial biceps muscle. J MorpholSci 2008; 25(1-4):157-214.
- Pakahale SV, Borole BS, Mahajan AA. Study on the Accessory Head of the Biceps Brachii in Indians which was Done during Cadaver Dissections. J Clinic Diag Res 2012, 6(7): 1137-1139.
- Jayanthi AA, Elezy MA. Study of Variations in the Origin of Biceps Brachii Muscle in Kerala. Inter J Sci Res Pub 2012; 2(8):1-4.
- Natsis K, Vlasis K, Tsakotos G, Totlis T, Koebke J. A case of a supernumerary third head of the biceps brachii muscle - clinical significance.Aristotle Univer Med J 2010; 37(2):39-41.
Garima Pardhi, Savita Gadekar. UNILATERAL VARIATION IN BICEPS BRACHII MUSCLE WITH FOUR HEADS. Int J Anat Res 2014;2(4):777-780. DOI: 10.16965/ijar.2014.548