Prefrontal cortex and acute stress: what happens
Under acute stress, the prefrontal cortex (reasoning, language, planning) is inhibited in 200ms by the amygdala. You lose these functions for the stress duration. Neurological base for 'I couldn't think'.
Why it happens — the mechanism
Noradrenaline and cortisol activate alpha-1 and glucocorticoid receptors in the prefrontal cortex. Result: connectivity with other brain areas drops 40-60%. Arnsten (Nature Neuroscience 2009): under stress, subjects lose 50% working memory.
How the Avikzar System answers it
The Avikzar System bypasses this block: reflexes anchored in cerebellum and basal ganglia don't need cortex. They remain 100% available even under maximum stress.
Yehouda Avikzar (10th Dan) — Freezing isn't your fault — it's your biology. But not training after experiencing one is your responsibility.
Frequently asked questions
Does the prefrontal recover?
Yes — minutes after stress ends. But chronic stress brings structural changes within months.
Other reactions to danger
Train the reflexes that bypass freeze
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