*cracks knuckles*
Everybody buckle up, this is gonna get messy.
Vividness has always been interesting to me, as a conceptual framework from which to approach the study of dreams and lucid dreaming. In many models, it's very easy to segregate vividness, clarity, detail, whatever you want to call it, from the usual core concepts (like dream control or lucidity for instance). As if it's some nebulous thing that doesn't belong in traditional models! But vividness actually follows very distinct patterns and rules in the context of both lucid and non-lucid dreaming.
Let us first consider the difference between lucid dreams and non-lucid dream from a neurological perspective. A cursory glance into the literature reveals activity in the dorsolateral prefrontal cortex which is only present during lucid dreams. "So what?" you wonder aloud. Well, for those unaware, that section of the brain is most closely associated with self-awareness and....wait for it....working memory. And working memory is responsible for your ability to not only focus, but process information (through retrieval and storage of long-term memories).
The astute among you will have noticed by now. Tell me: what are the three fundamentals necessary for lucid dreaming? That's right, Sageous! Self-awareness, focus, and memory! And so, when we develop these aspects of ourselves, we strengthen the pathways allowing our dorsolateral prefrontal cortex to activate while we're asleep. And that activation inevitably results in lucidity! Cool!
"But vividness!" you shout, expecting me to hear, "What has any of this got to do with what causes vividness?" Good question! But patience is important, and this writing stuff takes awhile! To understand how vividness occurs, you must first understand how dreams are formed. This takes us to the non-lucid dreaming portion of the tour. Please--no flash photography.
BillyBob does a great job of explaining it! I explain it at a slightly higher and metaphorical level! Read the relevant parts--the rest is extra credit and won't be on the final exam. Great, now you know how dream formation works! Which means you now understand--really and truly understand--that images in all dreams are formed from memories. The stronger the memory, the stronger the associations to that memory, the more vivid the imagery. This is why focusing all your attentions on a single object--or group of objects--or part of the dreamscape--will bring out more and more detail and vividness. Thus, the level of detail--the level of realism--is directly determined by the net strength of all associations and their schematic tangents. In layman terms, the better you know the environment and the objects in that environment, the more vivid things will be.
Of course, with lucid dreams, you have the benefit of working memory, which allows you to traverse synaptic passages and retrieve or store memories as easily and naturally as you would if you were awake. Of course, the simple biological laws of dream formation are still in effect--but that's beside the point. The point being that lucidity gives you the ability to directly affect how vivid a dream can be, precisely because you've activated your dorsolateral prefrontal cortex. Yay!
Please leave your valuables on the seat on your way out of the vehicle. Thanks, and have a pleasant evening!
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