Do cases of amnesia support the idea of separate memory stores? Yes, they do. If brain injury destroys one memory process but does not destroy the others, it really is supporting evidence. However, sometimes memory impairment occurs without any visible brain injury.

Patient WO, known as William, can remember everything in his life clearly until 1.40 p.m. on 14 March 2005. This was the moment he was injected with a local anesthetic before a routine procedure at the dentist. Since then he can only store memories for 90 minutes. What baes psychologists is that there was no brain injury involved in this case of anterograde amnesia—so what is the physiological basis? Since then, every day WO has woken up thinking it’s the date of his dentist appointment. Before the appointment, his health was perfectly normal and there seemed to be nothing wrong with his brain. Now he relies completely on his electronic journal that lists the things he has done, has to remember, and has to do. WO is indeed caught in a 90-minute window of the present. Time goes past and takes all memories with it. The single new episode his memory was able to retain was the knowledge of the death of his father—not how it happened or when, but the very fact. https://tinyurl.com/k7aeevv

How can this case of amnesia be explained? Search online for some of the current hypotheses.