What does your subconscious mind do whilst you are asleep?

Keeping you alive is the auto brain and if it is disturbed it can jostle the subconscious mind of the upper lobes. If I fall asleep and my neck bends sideways I always have vivid dreams. The brain stem or lymbic system has all the nerves ping through it. If the spinal fluid has unbalanced chemicals in it your lymbic system can make the unconscious brain start up and send random memories ociated with the chemicals. Also any noises or sensations can be half felt and sentto the upper brains and they add the messages to the subconscious dream. Like if your hormones are hot you will dream that way of if you have sadness you will get it in the dream. The electrical signals will go somewhere.