Verstijvingsintensiteit 3/5

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'.

Waarom dit gebeurt — het mechanisme

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.

Hoe het Avikzar-Systeem hierop antwoordt

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 (10e Dan) — De freeze is niet uw schuld — het is uw biologie. Maar trainen na er een te hebben beleefd, dat is uw verantwoordelijkheid.