Activation-synthesis theory of dreaming suggests that portions of the brain become active in REM sleep, such as the amygdala and hippocamus, that are heavily involved in sensations and memory. What we call dreams may be simply our consciousness attempting to interpret these signals. While this may seem like meaninglessness, it actually can be seen as the brain's most creative state, wherein we create any possible combination of random information.
Similarly, but slightly more functionally, information-processing theory states that the REM cycle is a part of the brains function of processing information that it received throughout the day. This shows dreams as a by-product, or perhaps even a tool, in the process of a brain completely digesting the information it has received. This is similar to action-synthesis in being an effect of a separate brain function.
There are numerous prominent theories about why we dream and what they mean. Perhaps most intriguing is Freud’s psychoanalytic...
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