Dreams are not caused by any single neural transmitter or even by one single area of the brain. At least three separate neural transmitters are suppressed during dreams. Different neural transmitters and different areas of the brain become active in various sleep stages and in different sorts of dreaming. The Wikipedia article attached below provides more technical information along with additional links to research papers.
Acetylcholine
Permanent neural hearing loss most often results from damage to the acoustic nerve and the parts of the brain that control hearing. Strokes, multiple sclerosis , and acoustic neuromas are all possible causes of neural hearing loss.
activation-synthesis model
wet dreams
Vivid dreams
Just that. Being abstinent causes wet dreams. It's the body's natural way of processing unused fluids.
Osteophytic encroachment of the neural central joints at C5-6 is when degeneration of a disc causes obstruction. This obstruction occurs at the foramina at C4-5.
A neural impingement is a physiological flaw that will entail disintegration of the spinal column. This often causes so much pain and the treatment is mostly focused on alleviating the pain on your spinal cord.
The activation-synthesis theory suggests that dreams are mental responses to random bursts of neural stimulation.
There is no special cause of early morning dreams. But the dreams that occur just before awakening are remembered more easily and often than dreams from other periods of sleep.
Nana places a specialized hairpin with a transmitter on Lucy's/Mariko's forehead. This transmitter causes interference with their electromagnetic fields, preventing them from using their vectors effectively.
There are about a dozen solid, researched and peer reviewed medical and scientific theories on why we dream. Psychosomatic theory, continual-activation theory, dreams as resonance in neural circuits, dreams as excitations of long-term memory and activation synthesis theory are but a few.What's clear is that dreams cannot foresee the future and many times dreams don't mean anything at all.