جستجوی مقالات مرتبط با کلیدواژه « lateral cord » در نشریات گروه « پزشکی »

The brachial plexus is the largest and most complex neural plexus in the body located in the neck and axilla. So far, there have been many reports of various variations in the brachial plexus that are of clinical significance. In the present study, while dissecting the upper limb of a 54-year-old man in the dissection room of Shahid Sadoughi University of Medical Sciences in Yazd, a rare variation was observed in the lateral cord branches of the plexus. In this case, the medial pectoral nerve, which normally separates from the medial cord, originated from the lateral cord. Awareness of this variation is important for anatomists, surgeons, anesthesiologists and radiologists to interpret the graphs, etc., and can help to reduce clinical complications during surgery and better interpret and diagnose the graphs.

In lateral side of the lateral cord is part lateral pectoral nerve and musculucutaneous nerve. Before piercing of the coracobrachialis muscle. the cord gives a muscular branch to this muscle from its lateral side. After sending muscular branches to biceps brachii and brachialis it pierces the coracobrachialis muscle and coures downwards for a long distance at the middle of the arm into lateral forearm skin, that named as lateral forearm cutaneous nerve. Finally it is shape at the middle of the arm, lateral root median nerve. variation in the course and branching of lateral cord is important for surgical and radiologists specially in relation to surgeries involving this region. Case report: During routine dissection of upper limbs on an adult male cadaver for education medical students of Zabol Medical Sciences University, variation in the course and branching of lateral cord was noted. The lateral cord was found to pierce the coracobrachialis muscle. Before piercing, the cord gave a muscular branch to this muscle from its lateral side. After emerging from the muscle, it divided at the middle of the arm into two branches.The medial branch corresponded to the lateral root of the median nerve, where as the lateral branch corresponded to the musculocutaneous nerve. The latter coursed giving muscular branches and finally it bifurcated giving two terminal branches. The lateral branch formed the antebrachial cutaneous, while the medial branch coursed downwards for a short distance deep to the brachial artery. Interestingly, this branch joined the median nerve forming communication with it. Discussion and During embryologic development of the procedure generated this variation in the course and branching of lateral cord of brachial plexus. obviously, Such intercommunications between musculocutaneous nerve and median nerve have great clinical importance in the diagnosis of related neurological disorders and surgical procedures in this region.

The brachial plexus is the plexus of nerves that supply the upper limb. Anomalies in the formation of lateral cord of brachial plexus and communication between its branches are commonly observed but the variation of the course of lateral cord is very rare. We observed that lateral cord of brachial plexus and its branch had a different configuration in dissecting room in Bandar Abbas medical school. Here, the lateral cord pierced the coracobrachialis muscle and then divided into the musculocutaneus and the lateral root of median nerve. After a distance, the lateral root of median nerve joined the medial root of median nerve, and median nerve formed anterior to brachial artery. The rest of the course of the median nerve and the musculocutaneous was normal in arm region.