Stress Doesn't Stay in Your Head

It was watching a documentary called Stressed that really opened our eyes to how much stress affects the body. We see a chiropractor who uses Dr Scott Walker’s Neuro Emotional Technique and his remedies, so we had felt some of this already. Seeing the science laid out, with brain scans to back it, put words to it. What follows is what we took from the film and the research behind it, in our own words. ^[1]

Where the word stress came from

Stress was an engineering word long before it was a feeling. In the 1600s Robert Hooke used it to describe the load a bridge could carry before it buckled, and the body has been compared to a machine ever since. Around the same time the philosopher René Descartes argued that the mind and the body were two separate things. That idea shaped Western medicine for three hundred years, and in some rooms it still does.

The modern meaning came from Hans Selye, a Hungarian-Canadian scientist in the 1930s, who mapped what the body goes through when a threat does not go away and gave it the name stress. He built on Walter Cannon, who had already named the fight or flight response and the body’s drive to get back to balance, which he called homeostasis. Those two ideas, the alarm and the return to calm, are the whole story in miniature. ^[2]

What stress does to your body

When your brain decides something is a threat, whether that is a car behind you, a hard conversation or a harsh thought about yourself, it fires the same alarm through your nerves, your hormones and your immune system all at once. In a short burst this is brilliant. Your focus sharpens, blood goes to your muscles, your heart speeds up, and digestion and repair are put on hold until the danger passes. ^[2]

The part of the nervous system that runs the alarm is the sympathetic branch, fight or flight. Its partner is the parasympathetic branch, which you could call rest and restore. That is the mode where you digest properly, repair tissue, lay down memories and keep your immune system strong. The two are meant to take turns. Modern life keeps a lot of us stuck in the first one. ^[3]

The catch is that the brain does not reliably tell the difference between a real danger and a worry. A deadline, a memory or a thought you keep circling back to sets off the same chemistry as a snake on the path. When that alarm never fully switches off, the effects pile up. Wounds heal more slowly, immune responses weaken, and the risk of heart disease climbs. ^{[3] [4]} Picture an engine built for short hard bursts left revving flat out all day. Something eventually gives.

Many people feel it first in their gut. The digestive system has its own dense web of nerves and reacts quickly to stress hormones. It is no accident that so many people find their digestion settles once the pressure in their life eases.

Emotions live in the body, not just the head

In 1972 a young scientist named Candace Pert found the brain’s opiate receptor, the exact spot on a cell where a molecule like morphine locks on. ^[5] That raised an obvious question. Why would the brain have a lock for a key the body does not make? The answer was that it does make the key. We call those molecules endorphins.

Pert spent the rest of her career tracing what she called the molecules of emotion. The chemical messengers behind feelings, called neuropeptides, do not stay in the brain. Their receptors sit on immune cells, on the lining of the gut, in the skin, right through the body. ^[6] So when you feel fear or grief or relief, it is not a thought with a physical side effect. It is one event happening in the whole of you at once. The nervous system, the hormones and the immune system are not separate departments. They are one network.

The field that studies this has a long name, psychoneuroimmunology, the study of how the mind, the nerves and the immune system talk to each other. It has shown that stressful emotions change how white blood cells work, blunt the response to vaccines and slow wound healing. These are not small effects, and they are happening inside you right now in response to how you are feeling. ^{[3] [4]}

When the body gets stuck

Most of us know that a frightening or painful experience leaves a mark. What is less obvious is that the mark can stay long after the thinking mind has filed the event away. The deeper parts of the brain that hold emotional memory, the limbic system, do not run on a calendar. They do not know that years have passed. ^[4]

That is why someone can be chopping vegetables and suddenly feel the full rush of a crisis from a decade ago. A smell, a sound, a tone of voice, and the body reacts as if it is happening now. It is not remembering. It is reliving. Long-term stress of this kind actually changes the wiring between the thinking part of the brain, the fear centre and the memory centre, which is why knowing you are safe so often fails to reach the feeling of being safe. ^[4]

Our chiropractor describes it the same way the film does. The body can carry the weight of something the conscious mind calls finished, or even trivial. What matters is not how big the event was, but what state the nervous system was in at the time, and whether it was ever given the chance to finish its response and settle.

What the brain scans showed

The part of the film that stayed with us was the research. A team at the Marcus Institute of Integrative Health at Thomas Jefferson University ran a trial with cancer survivors who were still being ambushed by distressing memories of their diagnosis, months or years on. Before treatment, each person listened to a recording of their own story inside an MRI scanner while their heart rate and skin response were measured. The stress showed up clearly, in the brain and in the body. ^[7]

They then had four or five short sessions of Neuro Emotional Technique, Dr Walker’s method for finding and settling the emotional charge attached to a memory. When they listened to the same recording afterwards, the region of the brain most tied to traumatic memory, the parahippocampus, had largely gone quiet. Their distress scores dropped and their overall mood and anxiety improved, not just around that one memory. ^[7]

A second paper from the same team found something nobody expected. The cerebellum, the walnut-sized structure at the back of the brain that we were all taught handles balance and movement, had changed its connections too, and heart rate responses had settled with it. The cerebellum, it turns out, helps regulate emotion and the automatic nervous system as well. ^[8] None of this was based on how people said they felt. It was in the scans and the measurements, the kind of evidence that convinces a sceptic.

What we do with this

None of it means every headache is a buried feeling, or that illness is a failure of the mind. Stress, whether it comes from food, sleep, work or emotion, lands on top of whatever weak points a person already has, and that is where things give way. Easing the emotional part of the load does not replace good food, good sleep or good care. It works alongside them and often makes them work better.

For our family, that means a chiropractor who uses Dr Walker’s remedies and follows a similar protocol, and it means paying attention to the quieter habits. Practices like meditation, breathing and yoga measurably lower cortisol and blood pressure in people carrying a heavy load, because they move the body out of the braced state and back into the one where healing happens. ^[9] The body already knows how to do that. It only needs the conditions.

One thing from the film that we keep coming back to is how many of us carry patterns we picked up as children because they kept us safe. The self-criticism that kept a child careful. The watchfulness that kept someone out of trouble. They were useful once, and the nervous system was simply never told it could put them down. That is not a flaw in you. It is a body doing its best with old information.

We believe the body is an amazing creation, and that includes the weight it carries for us. Give it a clear run, ease what is pressing on it, and it knows what to do. The mind and the body were never two things in conversation. They are one thing, and it is worth listening to.