High Quality Content by WIKIPEDIA articles! Hyperthymesia, also known as piking,hyperthymestic syndrome or highly superior autobiographical memory (HSAM), is a condition in which an individual possesses a superior autobiographical memory, meaning he or she can recall the vast majority of personal experiences and events in his or her life. The term “hyperthymesia" is derived from the Greek words thymesis meaning "remembering," and hyper meaning "excessive".