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Figure 9: (a) The LON lies at that the posterior border of the sternocleidomastoid muscle. The path of the nerve (green), prior to any incisions being made. The proximal and distal areas of tenderness are marked with an “X.” It is important that the surgeon give themselves adequate exposure to identify the sternocleidomastoid muscle. (b) Larger nerves should be decompressed, while smaller nerves can be removed using traction neurectomy. Prior to avulsion, a nerve stimulator should be used to confirm avoidance of the spinal accessory nerve

Figure 9: (a) The LON lies at that the posterior border of the sternocleidomastoid muscle. The path of the nerve (green), prior to any incisions being made. The proximal and distal areas of tenderness are marked with an “X.” It is important that the surgeon give themselves adequate exposure to identify the sternocleidomastoid muscle. (b) Larger nerves should be decompressed, while smaller nerves can be removed using traction neurectomy. Prior to avulsion, a nerve stimulator should be used to confirm avoidance of the spinal accessory nerve