[Threat]

[Amygdala]

(signals)

[Hypothalamus]

[Adrenal Glands]

release ↑Adrenaline & ↑Noradrenaline

[Pituitary Gland]

release ACTH

[Cortisol, CRH, ACTH]

[Hypothalamus]

[Adrenal Cortex]

release ↑Cortisol

(Positive feedback)

↑Adrenaline/Noradrenaline

(amplifies the surge)