If you live with a symptom that doesn’t behave the way an injury should — pain that moves, fatigue unrelated to exertion, dizziness or tension that comes and goes on its own schedule — you have probably already done a great deal of reading. You may know your scans better than some of the clinicians who ordered them. You may have encountered the idea that your symptom is “neuroplastic” already.
So what you won’t find here is another person telling you how your pain is just stress, or that it is in your head. We will instead track through what is happening in your brain-body connections that produce the symptoms.
The brain has multiple ways of protecting us
The simplest explanation of neuroplastic symptoms is that the brain has become accustomed to treating safe things as dangerous and it produces symptoms in response. Symptoms are the brain’s form of protection. But the brain does not run a single general-purpose danger detector. It runs several distinct protective systems that respond to different threats, produce different states, and are quieted by different things.
A note on where this comes from
The clearest map of these systems comes from the neuroscientist Jaak Panksepp, who spent his career identifying the brain’s basic emotional systems. Panksepp found that emotion is not one undifferentiated state. It is a set of distinct systems, each with its own circuitry, its own function, and its own characteristic feel.
Panksepp helps us identify which emotional system is generating a given symptom — and that points toward more targeted change and recovery.
Two of Panksepp’s systems are worth knowing by name because they are the most common generators of persistent pain.
The research behind this
The framework of distinct emotional systems is set out in detail in Jaak Panksepp and Lucy Biven’s The Archaeology of Mind: Neuroevolutionary Origins of Human Emotions (Norton, 2012). It presents the brain’s primary emotional systems — including FEAR and PANIC/GRIEF — as evolutionarily ancient circuits, conserved across mammals, each with distinct neural pathways and distinct functions. Panksepp’s wider body of work, spanning several decades of affective neuroscience, established that these systems can be located and studied as physical circuitry rather than treated as abstract categories of feeling. Applying this work to neuroplastic symptoms is an extension of that research, not a claim made by Panksepp himself.
The first: FEAR
The first is the system Panksepp named FEAR.
When the fear system is running, it feels like bracing. The body readies itself — muscles, breath, attention all narrow toward something that might harm you. There is a sense of urgency: an urge to escape, to avoid, to get away or get safe. It is sharp, mobilized, outwardly oriented against a threat.
The FEAR system is the brain’s protection against physical danger to the body. It evolved to detect threats to your physical safety and to drive the actions that get you clear of them. And it has a specific release: When the danger passes and safety is restored, the system stands down. That is the input it is built to respond to.
A neuroplastic symptom driven by FEAR has a running logic. The brain has come to read ordinary situations — a movement, a posture, a place — as physically dangerous and it produces protective symptoms accordingly.
The brain can do this in unexpected ways. For instance, one time when I was driving to the mountains for a day of leisure, I got a surge of pain that continued to persist through the day. There was something about the context of driving on the highway and seeing the mountains that activated my FEAR circuitry. It baffled me though. Why would my brain interpret the beautiful mountains as a threat? After a few days I put the pieces together. In childhood I spent a great many days travelling to the mountains to ski race. My brain had remembered the feeling of fear and pressure that accompanied those morning drives to the mountains: the pre-race anxiety. Seeing the mountains as an adult while in the context of driving was enough to remind my brain’s older protective system of the fear it had felt, and this activated pain at a pre-conscious level.


