MEMORY and pain are linked, biologically.
Let me explain.
There are two kinds of memory.
In the lab, like the layers of an onion, we peel away the superficial layers trying to understand the depths of pain. Memory at its most superficial is a stored piece of information that is recollected as an old experience within the context of the present time. As this old information is within a new context, it has the power to influence incoming information/experiences, changing the present condition of the individuals’ perceptions. And thus, old memories govern how new memories are perceived and stored.
Pain at its most superficial is unpleasant sensory and emotional experience associated with actual or potential tissue damage to an individual. It has a physical presence. Pain is both tangible and intangible.
Pain is information. Memory is information. If I were to place these two concepts in a hierarchy, I would say that memory is before pain. Memory is primary; pain is secondary.
Without memory, there can be no pain.
Without pain, memory can still exist.
Therefore, biologically, in order for pain to exist, then the mechanism for the creation, storage, and modification of memory, must exist in the nervous system (i.e., evident by circuits, neurons, spines, synapses, or fibers).
Memory and pain are linked, biologically