Four-headed biceps and triceps brachii muscles, with neurovascular variation.

Anatomical variations of the biceps brachii and triceps brachii have been described by various authors, but the occurrence of four-headed biceps brachii and triceps brachii in an ipsilateral arm is rare and has not been reported before in the literature. During routine cadaveric dissection in the department of anatomy, Kasturba Medical College, Mangalore, India, various unusual variants were noted in the left arm of a cadaver of a 67-year-old man. The variants include a four-headed biceps, a four-headed triceps, communication between the musculocutaneous and median nerves, and a high origin of deep brachial artery from the axillary artery. The occurrence of these anomalies and the clinical and morphological significance are discussed.

Coexistence of an axillary arch muscle (Latissimocondyloideus Muscle) with an Unusual Axillary Artery Branching: case report and review

RESUMEN: La axila es un compartimiento piramidal relativamente pequeño, localizado entre la pared torácica y el brazo, que contiene músculos y estructuras neurovasculares. Estas estructuras son importantes desde los puntos de vista clínico y morfológico. En este artículo reportamos la presencia de una variación del músculo latisimocondíleo y de la arteria axilar, la cual se encuentra debajo del músculo mencionado. La variación es única en su tipo. La morfología y el significado clínico del músculo son discutidos.