- Discussion:
- in middle of the arm,
ulnar nerve pierces medial intermuscular septum and descends in front of the medial head of the
triceps;
- in 70-80% of individuals,
nerve passes under arcade of Struthers;
- the arcade is a thin aponeurotic band extending from medial head of
triceps to the medial intermuscular septum;
- it lies approximately 8 cm proximal to the medial epicondyle;
- the arcade may appear as medial triceps muscle fibers crossing superficial to the ulnar nerve;
- arcade is not site for entrapment under ordinary circumstances, but it may become point of kinking if anterior transposition of ulnar nerve is performed;
- following transposition procedures, the surgeon should release the arcade if it appears that the nerve is under tension;
Historic origin of the “Arcade of Struthers.”
Redefining the "Arcade of Struthers
