2 Answers

  1. Long-term memory is associated with the synthesis of proteins for the formation of neural connections. So that a person does not remember all the garbage that he dreamed, there are special substances that inhibit this process, and during sleep and for some time after it they are produced. But, apparently, they can be produced more or less, and depending on this, you will remember the dream or forget it.

  2. There is no exact answer yet, but there are some observations.

    For example, dreams with the most emotional content often linger in your head. Your brain will also store a dream memory for you if the dream is part of the agenda that your brain has set for you.

    But what separates us from the exact answer to this question is, among other things, the fact that it is difficult to distinguish your real dream from what you have already thought up on waking. It's just that when you wake up and the dream is already beginning to fade, you start to make sense of it with the rational part of your brain in order to grasp it, and this distorts everything: a small piece of the dream remains, hung with your thoughts and interpretations. I'm sorry, of course, that I went too far.

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