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'.
Por qué ocurre — el mecanismo
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.
Cómo responde el Sistema Avikzar
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 (10º Dan) — El freeze no es culpa suya — es su biología. Pero entrenar después de haber vivido uno, es su responsabilidad.
Preguntas frecuentes
Does the prefrontal recover?
Yes — minutes after stress ends. But chronic stress brings structural changes within months.
Otras reacciones ante el peligro
Entrene los reflejos que sortean el freeze
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