<unk> , or highly superior autobiographical memory (HSAM), is a condition that leads people to be able to remember an abnormally large number of their life experiences in vivid detail. It is extraordinarily rare, with only about 60 people in the world having been diagnosed with the condition as of 2021. American neurobiologists Elizabeth Parker, Larry Cahill, and James McGaugh (2006) identified two defining characteristics of<unk> : spending an excessive amount of time thinking about one's past, and displaying an extraordinary ability to recall specific events from one's past. The word<unk> " derives from Ancient Greek: hyper- ("excessive") and thymesis ("remembering").
Hyperthymesia
Cardiovascular drift
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Cardiomegaly
Adynamia
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