“…The RP has been observed preceding speech production (e.g., Wohlert, ), swallowing (Huckabee, Deecke, Cannito, Gould, & Mayr, ), and mandibular movements (e.g., Yoshida et al., ). Interestingly, Korb, Grandjean, and Scherer () observed a RP before the voluntary production of expressions of happiness, analogous in terms of amplitude and scalp topography to the RP preceding finger movements.…”