I have dreams every night. In dreams, I experience beings that are of the same nature of things experienced in reality. Are these beings made out of energy and matter like those in reality? If not, what're they made from? If yes, how do we form them in mind, where does the extra matter and energy come from and how are they conveyed in a dream?

They aren't real. There is no extra matter involved.

 

I suspect what you're using is the same brain mechanisms that allow you to interpret images you see, just with a different input. So no energy input beyond what your brain already needs/uses.

They are constructions using the same mechanisms that your brain uses when awake except the data used to form them is coming from memory. Pretty much what Swansont says.

Edited March 19, 201411 yr by StringJunky

Is our short-term memory stored in higher quality than long term memories? As said, I dream every night, but, when I dream it usually relates to the art I was looking at on the internet, my thoughts, and the events I experienced that day. This leads me to believe we humans have a short-term memory cache like computers do, and when we go to sleep it resets or at least becomes of a lower used quality. Perhaps dreaming is siphoning the youth from short-term memory. And how and why does our body and mind produce a dream world for us to dream in? It comes from memory, but that doesn't explain why our bodies and mind are capable of building a world, that explains us experiencing the dream world, not the dream world constructed.

Edited March 20, 201411 yr by s1eep

That is how you experience the waking state as well though. Your brain takes the inputs from your senses and after some editing, presents you with a coherent narrative of events.

 

This is a fun example demonstrating your blind spot:

 

 

 

 

Your brain fills in the gap, without even bothering to inform you of the fact.

Edited March 20, 201411 yr by Endy0816