A Cadaveric Investigation of the Dorsal Scapular Nerve

Figure 1

(a) A 90° angle ruler was placed directly on top of the laryngeal prominence creating a transverse plane as denoted by the yellow pins. The DSN branches from C5 and pierces the middle scalene muscle. (b) An electronic sliding caliper was used to measure the distances (cm) from the transverse plane (white dashed line) of the laryngeal prominence to the DSN as it enters the middle scalene muscle (green pin), crosses this muscle (blue pin), and exits the middle scalene muscle (orange pin). SCM is sternocleidomastoid muscle.

(a)

(b)