Figure 5.

Effects of BDNF Val66Met genotype alone and stratified for COMT Val158Met carrier status on motor learning performance. A, Considering BDNF genotype alone, both groups exhibited similar motor learning, i.e., mean reaction time differences between sequential and random stimuli of the SRTT. B, BDNF Val/Val carriers (gray circles) that were also COMT Met/Met carriers showed a trend for better performance compared with BDNF Met carriers (black triangles; ANOVA, n.s.). C, No differences were found in COMT Val carriers.