A common belief is that eating too much before going to sleep can cause to have nightmares. In fact, I often experience it: I systematically have nightmares after eating too much in the evening.
Then I was wondering: is there really a link between digestive system's activity and unconscious brain's activity?
If it actually exists,
- is the influence linked to the neurons we have in out gut?
- or is it linked to the augmentation of the concentration of a nutrient in our bloodstream (which can then reach our brain and)?
- or is the neuronal activity which control digestion that interferes with the process of dreaming?
If the influence is linked to the augmentation of the concentration of a nutrient in our bloodstream, does this mean what we eat actually controls our mood or level of anxiety, or any subconscious process? (regardless of compounds known for having a particular effect, like theobromine, etc...)