Autonoetic consciousness
The self-aware sense of re-experiencing a past event — knowing that it is you, now, remembering something that happened to you, then. Proposed by Endel Tulving in 1985.
Tulving distinguished between three kinds of consciousness tied to memory: anoetic (non-knowing, automatic), noetic (knowing something as fact), and autonoetic (knowing that you personally experienced it). Autonoetic consciousness is what turns a remembered fact about your life into a re-lived moment — the difference between knowing you went to your grandfather’s funeral and being able to step back into the room.
SDAM can be read as a severe reduction in autonoetic consciousness specifically. The semantic knowledge persists — the who, what, when, where. What is missing is the self-aware re-experiencing. This is why people with SDAM can describe their lives in detail without ever feeling they have returned to the events they are describing. It is also why SDAM is dissociable from amnesia: in amnesia the facts themselves are lost; in SDAM the re-living is.