The condition itself has only been defined since 2006, and all of the men who are hyperthymesic are left-handed, which could be a coincidence or an indicator of the condition. There are said to be some detrimental effects on thinking capacity since a stream of memories may be disruptive to an average day’s activity, and although people may be able to associate events with dates they do not have photographic memories and may still have difficulty memorizing common information.