A form of amnesia, selective memory loss is a rare side effect of head injuries when the victim loses certain parts of his/her memory. Not much is known because this only results when certain areas of the head are traumatized. Common elements that may be forgotten: relationships, special talents (eg: juggling, whistling, instrumental talents, etc.), living area, abilities in certain areas (eg: a new gymnast forgetting she can not cartwheel yet), and events such as concerts, shows, traumatic events (eg: a death/suicide of a loved one or attempt on ones own life). More research is being done into elements that are forgotten and what areas of the skull must be traumatized to cause SML.