What is Nervous System Regulation? Part 1 of the Understanding Your Nervous System Series

Some days life feels manageable – we feel calm, clear-headed, able to handle whatever comes up. And other days, even small things tip us over the edge. We feel snappy, overwhelmed, we can’t sleep, or so flat we can barely get off the sofa.

This is the nervous system.

The nervous system runs the show

Your nervous system is the body's master control centre. It governs everything — how you sleep, how you think, how you feel, how you recover, how you connect with other people. It's working every second of every day, mostly without you noticing.

At its core, it has one fundamental job: to keep you safe. It constantly scans your environment — and your internal world: am I safe? Is this a threat? Do I need to act?

Depending on the answer, it shifts your body into different states. (More on those states in Part 2). For now, the key thing to understand is this: your nervous system state shapes your entire experience of life.

When it's regulated, you feel present, grounded, and capable. You can think clearly, rest properly, respond rather than react, and connect more easily with others.

When it's 'dysregulated' - which can mean you are stuck in a state of high alert, or shut down and withdrawn – it affects everything. Focus, sleep, relationships, creativity, performance.

What does "regulation" actually mean?

Nervous system regulation doesn't mean being permanently calm. It means having ‘flexibility’ — the ability to move between states in response to what's actually happening, and to return to a settled baseline when the situation has passed.

A regulated nervous system can turn up when you need energy and focus, and turn down when it's time to rest and recover. It responds to the present moment rather than old patterns and past threats.

Dysregulation, by contrast, is when the system gets stuck - either chronically activated (anxious, wired, unable to switch off) or chronically shut down (exhausted, numb, disconnected). Many people live in one of these states without realising it, because they've been there so long it simply feels normal.

Why is this important?

Nervous system dysregulation shows up as:

- Poor sleep or difficulty winding down

- Persistent fatigue that rest doesn't fix

- Anxiety or continuous low-level stress

- Unwanted behaviours and addictions

- Difficulty concentrating or making decisions

- Snapping at people you care about

- Feeling disconnected from yourself or others

- Hitting a wall creatively or professionally

These are not bad habits, lack of self-control or loss of spark. They don’t mean you are damaged or broken. They're signals from you nervous system that can be addressed and supported.

The good news is that the nervous system is remarkably adaptable. It is capable of learning new patterns, building greater flexibility, and finding its way back to regulation. This is called Neuroplasticity, and it's the foundation of approaches like Brainspotting.

Brainspotting works directly with the nervous system through the body and the deeper brain. Recent neurophysiological research has shown measurable changes in brain activity following even a single session: reduced cortical hyperactivation, decreased fast-wave activity associated with anxiety and ‘hyperarousal’, and greater overall brain organisation. In other words, the brain itself begins to change.

We'll explore what that looks like in practice throughout this series — and in the brainspotting articles linked below.

Next in the series: Fight, flight, freeze and fawn — what your nervous system does under pressure, and why →

Related reading: [What is Brainspotting?] | [What happens in a Brainspotting session?]

Louisa Collyns is a certified brainspotting practitioner working with clients in person and online.