The behavioural tests were recorded from wt and NPC1nmf164 mice. G. Mean ± SEM percentage of entry to the novel arm of the Y maze test (n=10 mice, 10 week-old; unpaired Student t test, **p = 0.0015). H. Mean ± SEM percentage of freezing time in the Contextual Fear Conditioning test (n=10 mice, 10 week-old; unpaired Student t test, ***p = 0.0002). I. Mean ± SEM distance covered during a 5 min period in the Open Field test (n=10 mice, 10 week-old). 