David BrimacombePost-concussion syndrome (PCS) recovery coach

Why Your Nervous System Overreacts #PCSRecovery #PostConcussionSyndrome #NervousSystem

2 Feb 2026 · 1 min

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In this educational monologue, David Brimacombe explains that the nervous system’s fundamental purpose is to keep the body safe by detecting threats and triggering alarm responses, much like a smoke detector. After a concussion, the nervous system becomes hypersensitive, so even minor, non‑dangerous stimuli (e.g., burnt toast, a boiling pot) can trigger a strong alarm response. This heightened sensitivity leads the body to perceive ordinary sensations as threats, contributing to the persistent symptoms of post‑concussion syndrome (PCS). The video sets the stage for understanding why recovery often requires calming the nervous system rather than simply treating the brain injury itself.

Chapters

So what you need to know about your nervous system is your nervous system is a very basic system. Its main job is to keep you safe. If it feels there's a threat, it is going to go ahead and sound off the danger alarms, just like a smoke detector would. Now, the problem after a concussion is that smoke detector is highly sensitive. Burnt toast, something boiling over onto the, to the burners is going to cause that thing to go off. Now, Does that mean that there's actually danger here? No, not necessarily, but your body perceives it to be so.