Maximal scapular protraction increases the safety distance of the spinal accessory nerve during lower trapezius tendon harvest: a cadaveric study

Maximal scapular protraction increases the distance between the SAN and the medial border of the scapula, providing a greater margin of safety during LT tendon harvest. In addition, a straight line from the trapezius tubercle to the vertebral spine facilitates clear differentiation of LT fibers from the MT.