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Normal anatomy. An axial oblique T2W sequence shows important anatomical landmarks. A) the anterior scalene muscle (*), the middle scalene muscle (^) and the clavicle (arrowhead) are identified. B) It is possible to appreciate how the roots (R) exit the neuroforamina and join within the scalene triangle to form the trunks (T). The divisions (D) are located behind the clavicle and become the cords (C) distally.
