Freeze Response: Definition and the Third Branch of the Stress Response
Freeze Response is the involuntary motor-inhibition state triggered by inescapable threat. Learn the neuroscience, PTSD link, and performance implications.
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Fight-or-Flight: Cannon’s Definition, Mechanism, and Implications for Performance
How fight-or-flight works: the sympathoadrenal axis, the HPA second wave, cognitive impairment under acute stress, and the tend-and-befriend correction.
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Allostatic Load: McEwen’s Definition and the Cumulative Wear-and-Tear of Stress
Allostatic load is the cumulative physiological cost of chronic stress, indexed across metabolic, neuroendocrine, and immune biomarkers. Coined by McEwen.
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PTSD (Post-Traumatic Stress Disorder): Definition, Diagnosis & the Brain Architecture
PTSD is a post-trauma psychiatric disorder marked by intrusive re-experiencing, avoidance, and hyperarousal. Brain mechanisms, diagnosis, and treatments.
