Systematized amnesia

Unsure if this falls under this category.

My wife has severe PTSD from a few traumatic experiences in her life from as young as 7 years old. She has attempted to explain to me that her mind is similar to what we see in the movie DreamCatcher. She has never seen the movie. She explains she is able to erase memories at will or “file them away”.

3 years ago she was having a episode and woke up without the previous 14 years of memories (which dated back to an exact moment of one of the traumatic experiences). She had some medical attention but after a few days a lot of her memories were returning and then refused any more professional help. She’s in a better place now but I am still curious if someone could give me more information on what exactly happened, what is she referring to with her mind (is there a term?).