Why do (sometimes) seemingly unimportant moments really stick as detailed memories, and some seemingly very important moments are hard to recall?

Question

At times, apparently mundane memories are really easy to recall, and moments you think ‘I want to remember this in detail, even gonna do an eye-camera pan of the scene’ don’t come back that easy. Why?

In: Biology

Answer 1

I feel it’s probably based on chance. Though our brain does a good job at recognising what to memorise, sometimes it fails at it… and it just happens to be that something unimportant is remembered clearly. Another reason could be that this seemingly unimportant memory (when it was part of temporary fresh memory) was revised while talking to someone. This revision of a memory causes it to be remembered very well by the brain.