David BrimacombePost-concussion syndrome (PCS) recovery coach

PCS Recovery Tip: It’s Your Nervous System #PCSRecoveryTip #PCSRecovery #PostConcussionSyndrome

19 Jan 2026 · 1 min

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In this short recovery tip, David Brimacombe explains how, after a concussion, the nervous system treats ordinary sensory inputs and stressors as threats. This heightened threat perception leads the nervous system to overcompensate, producing symptoms such as irritability, anxiety, and an intense, racing heartbeat that can feel like the heart will explode. He frames these reactions as the body working “too well,” responding to danger that isn’t actually present, and uses his own experience to illustrate the sensation.

Chapters

After a concussion, your body senses almost everything as a threat. It feels a danger in almost every situation. Lights, sounds, any kind of stressors responds to your body as a threat, and therefore your nervous system tends to overcompensate. Now, this might look like for you irritability, anxiety, It might feel like your body, your heart is going to beat out of your chest. For me, that was— those were the main sensations. It honestly felt like my heart was going to explode, but that's because it was working too well. It was overcompensating for a danger that wasn't really there.