English

Abstract

Variations in origin and insertion of muscles are common in upper limb. They may or may not be associated with neuromuscular abnormalities. Being common does not lessen their importance from the point of view of orthopaedic surgeons, cardiovascular surgeons, plastic surgeons and physiotherapists. During routine dissection of a middle aged male cadaver while teaching medical students in Government Medical College Jammu, We found a not so common variation in the insertion pattern of Brachialis muscle on the left side which beside its usual insertion was inserted as a thick muscular slip to the origin of Brachioradialis. So, a fibromuscular tunnel was formed between insertion of Brachialis and origin of Brachioradialis. The Radial nerve along with descending branch of posterior circumflex humeral artery passed beneath this tunnel. In this cadaver the Profunda brachii artery was very small and remained undivided .It continued as posterior division or middle collateral artery. The anomaly reported above is rare and can lead to neural, vascular or neurovascular compression symptoms. Normal anatomy of arm and forearm seen on the right side.