Third Head of Biceps Brachii (Caput Accessorium)

Biceps brachii is stated as one of the muscles that shows most frequent anatomical variations. Its most commonly reported anomaly is the presence of a third head arising from the humerus which is termed as Caput Accessorium ,therefore, detailed knowledge of this variation in different populations is important for surgical interventions of the arm, nerve compression syndromes and in unexplained pain syndromes in the arm or shoulder region. The goal of this study was to elucidate the incidence of this muscle in an adult U.P west population. Upper extremities of the total of 50 cadavers were dissected and studied for the presence of accessory heads of the biceps brachii muscle. The incidence of humeral head of biceps brachii was found to be 6%. In all cases, it was found unilaterally and only in male subjects. Knowledge of the occurrence of humeral head of biceps brachii may facilitate preoperative diagnosis as well as the surgical procedures of the upper limb thus avoiding iatrogenic injuries.