Nén dây thần kinh trụ ở khuỷu tay có thể xảy ra ở bất kỳ trong năm trang web đó bắt đầu proximally tại arcade của Struthers và kết thúc distally Trường hợp dây thần kinh đi ra khỏi flexor carpi ulnaris cơ bắp ở cánh tay. Thông thường XẢY RA NHẤT nén ở hai sitesÑthe epicondylar rãnh và điểm trường hợp dây thần kinh đi qua giữa hai | Compressive Ulnar Neuropathies at the Elbow I. Etiology and Diagnosis Martin A. Posner MD Abstract Ulnar nerve compression at the elbow can occur at any of five sites that begin proximally at the arcade of Struthers and end distally where the nerve exits the flexor carpi ulnaris muscle in the forearm. Compression occurs most commonly at two sites the epicondylar groove and the point where the nerve passes between the two heads of the flexor carpi ulnaris muscle . the true cubital tunnel . The differential diagnosis of ulnar neuropathies at the elbow includes lesions that cause additional proximal or distal nerve compression and systemic metabolic disorders. A complete history and a thorough physical examination are essential first steps in establishing a correct diagnosis. Electrodiagnostic studies may be useful especially when the site of compression cannot be determined by physical examination when compression may be at multiple levels and when there are systemic and metabolic problems. J Am Acad Orthop Surg 1998 6 282-288 Ulnar nerve compression at the elbow is commonly accepted as the second most frequently encountered nerve entrapment in the upper extremity exceeded in prevalence only by carpal tunnel syndrome. The incidence of ulnar nerve compression is probably greater if one includes those individuals who experience transient numbness and paresthesias when they lean on the flexed elbow or when the elbow is flexed for a prolonged period. Anatomy and Etiology The boundaries for potential ulnar nerve compression begin approximately 10 cm proximal to the elbow and end about 5 cm distal to the joint. The ulnar nerve can be compressed anywhere along this pathway at one or more of five sites Fig. 1 . In the middle third of the arm the ulnar nerve pierces the medial intermuscular septum and descends along the medial head of the triceps muscle. The first area of potential compression which is the widest begins proximally at the arcade of Struthers and ends .
