Module 3 - Neuroendocrinology covers the integrated functioning of the nervous and endocrine systems in stress responses, with emphasis on the HPA axis, sympathetic and parasympathetic nervous systems, catecholamines, cortisol dynamics, neurotransmitter synthesis pathways, and the concept of stress axis desynchronization.
The module teaches: (1) HPA axis anatomy and function — hypothalamus (CRH) → pituitary (ACTH) → adrenal cortex (cortisol); (2) Sympathetic nervous system activation and catecholamine release (norepinephrine, epinephrine); (3) Parasympathetic nervous system (vagal tone) and its anti-inflammatory effects; (4) Neurotransmitter synthesis pathways requiring copper, iron, iodine, B-vitamins (tyrosine → dopamine → norepinephrine → epinephrine); (5) Cortisol's metabolic effects: gluconeogenesis, lipolysis, proteolysis, insulin resistance, immune modulation; (6) Stress axis desynchronization — when different stress axes (HPA, SNS, immune) become uncoupled leading to disease; (7) Habituation vs. non-habituation phenotypes and their genetic basis; (8) Fetal programming and developmental origins of neuroendocrine dysfunction.
Module 3 provides the foundation for understanding stress-related disease in cPNI. Key clinical takeaways: (1) Chronic stress depletes catecholamines and causes cortisol resistance; (2) Micronutrients (copper, iron, B6, tyrosine) are essential for neurotransmitter synthesis; (3) Non-habituators require specific interventions to prevent chronic disease; (4) Vagal tone enhancement is therapeutic for inflammation; (5) Stress axis desynchronization underlies burnout, chronic fatigue, and metabolic disease; (6) Understanding cortisol rhythms guides intervention timing; (7) Fetal stress programming has lifelong consequences requiring early intervention.
- Taught by Daniel de la Serna
- Covers HPA axis, SNS, PNS, and their integration
- Emphasis on neurotransmitter synthesis pathways (tyrosine → dopamine → norepinephrine)
- Copper, iron, iodine are essential cofactors for catecholamine synthesis
- Introduces concept of habituation vs. non-habituation phenotypes
- Stress axis desynchronization is key pathological pattern
- Cortisol resistance develops with chronic stress
- Vagal tone is anti-inflammatory and protective
- HPA axis — core topic — anatomy, function, and dysregulation of HPA axis
- Cortisol — teaches cortisol physiology, metabolism, and clinical significance
- sympathetic nervous system — covers SNS activation, catecholamine release, and stress responses
- parasympathetic nervous system — teaches PNS function, vagal tone, and anti-inflammatory effects
- dopamine — covers dopamine synthesis pathway and role in reward/motivation
- norepinephrine — teaches norepinephrine synthesis and stress response function
- Adrenaline — covers epinephrine synthesis and acute stress effects
- tyrosine hydroxylase — teaches rate-limiting enzyme in catecholamine synthesis
- copper — essential cofactor for tyrosine hydroxylase and dopamine-beta-hydroxylase
- iron — required cofactor for neurotransmitter synthesis enzymes
- iodine — essential for thyroid function and brain neurotransmitter systems
- Habituators — introduces habituation phenotype and genetic basis
- Non-habituators — teaches non-habituation phenotype and clinical implications
- stress axis desynchronization — core concept — when stress axes become uncoupled causing disease
- vagal tone — teaches importance of vagal tone for inflammation regulation
- fetal programming — covers fetal cortisol exposure and developmental programming
- insulin resistance — teaches how cortisol drives insulin resistance
- postprandial lipemia — covers >40g fat threshold and neuroendocrine effects
- chronic stress — central focus — mechanisms and consequences of chronic stress
- burnout — stress axis desynchronization as mechanism of burnout