Short trains of transcutaneous auricular vagus nerve stimulation (taVNS) have parameter-specific effects on heart rate. - Badran BW; Mithoefer OJ; Summer CE; LaBate NT; Glusman CE; Badran AW; DeVries WH; Summers PM; Austelle CW; McTeague LM; Borckardt JJ; George MS (Brain stimulation, 2018)