Optimal Placement of Needle Electromyography in Extensor Indicis: A Cadaveric Study.
Jin Young ImHong Bum ParkSeok Jun LeeSeong Gyu LimKi Hoon KimDa Som KimIm Joo RhyuByung Kyu ParkDong Hwee KimPublished in: Annals of rehabilitation medicine (2018)
The center of EI muscle is located approximately 4.8 cm proximal to USP level and 7.2 mm lateral to the medial border of the ulna. Among the three methods, the technique placing the needle electrode at distal fourth of the forearm and lateral to the radial side of the ulna bone (M3) is the most accurate and closest to the center of the EI muscle.