LRRK2 and Cognitive impairment: Research specifically addressing cognitive impairment among Asian LRRK2 risk variant carriers remain very limited18,21,32,34,36,41,43, with two studies reporting higher MMSE scores among p.G2385R carriers34,36, with another reporting a higher frequency of “cognitive impairment”, based on MMSE scores, among a very small cohort (n = 11) of p.R1628P carriers41.