Compared to no stimulation (NS) what was the result of intraoperative BES applied to the spinal accessory nerve (SAN)  on  ΔCMS and ΔCMAP scores in patients with Level IIb + V neck dissections ?
 Mann-Whitney U-test demonstrated a significantly higher CMS score in the BES group at 12 months indicating significantly better preservation of shoulder function compared to the NS group (p = 0.007) (Fig. 3)