Which consciousness is responsible for suffering from amnesia?

There are people who suffer from amnesia, and there are also elderly Parkinson's patients who have forgotten who they are, as well as their relationships with all the people and matters around them. This is a problem of consciousness, related to the supreme faculty (rūpa-prasāda). Would the manas forget?

If a person suffering from amnesia is cured of the illness, their memory will be restored, which shows that the manas has always cognized all past dharmas. When a person with amnesia encounters certain people and matters, they may also vaguely feel as if they are familiar, which shows that the manas cognizes them. When a person with amnesia strives to recall and tries to recover their memory, it is the manas' perception (saṃjñā) that impels the mind consciousness to strive and think of ways to do so.