Perhaps a more troubling issue for the DIVA/GODIVA view is the frequently noted finding in the NHP literature that, for well-learned movements, activation in striatum and GPi typically lags activity in cortex and thalamus at movement onset in reaction time experiments, and furthermore reaction times are not negatively impacted by GPi inactivation in NHPs nor in PD pallidotomy recipients (Schwab et al., 2020; see Turner and Desmurget, 2010, for a review). Here, GPI is linked to Parkinson disease.