on time in dreams

I’ve read that in sleep our brains replenish themselves: neurotransmitters that move on impulse from one cell to another during our waking hours return en masse to their starting positions.  Apparently dreaming is a part of this systemic cycle of return.  I wonder, then, whether we might actually dream in reverse.  We know that images appear upside down on our retinas, yet we see a visual field that is right side up.  So might it be with the sequential pattern of our dreams.  Waking, we remember some hazy narrative that appears to play out in time in a semblance of the way we ordinarily make sense of our lives.  Yet our dreams often begin with some definite point and at length trail off vaguely.  We imagine that we have awoken and opened our eyes at some nondescript point of transition.  The world of dreams is blurry and ineffable, and whether pleasant or alarming, we sense that the content of our dreams is fleeting and immaterial. Though our dreams may provide clues that we could apply in our waking lives, they’re not what most of us consider solid information.  Maybe what’s happening is that our dreams begin from that definite point and roll backward from there, stretching back like a river that gradually diminishes as one travels towards its minuscule source. Of course not all of our dreams fit this pattern.  Some  dreams conclude emphatically at a point of rapture or terror.  These distinctly vivid dreams could also fit into this pattern of time reversal, as an artifact of the systemic resetting of our brains.  In this case, a strong and repeated pattern of neural activity during the day leaves a concentration of transmitters in one spot, and our dream retraces this torrent as it resets itself.  OK, I’m winging it here.  I haven’t come up with any way to test this odd speculation, and I’m not certain that it could be tested.

Disclaimer: despite appearances to the contrary, this is a piece of speculative fiction. It's pataphysics,not cognitive neuroscience.