Study Guide & Educational Overview
### Key Psychoneurobiology & Wellness Concepts:
* **Neurochemistry & Hormones**:
* *Cortisol*: Primary glucocorticoid stress hormone released by adrenal cortex.
* *Melatonin*: Pineal hormone entrained by circadian darkness to signal sleep.
* *Neurotransmitters*: Dopamine (motivation/reward), Serotonin (mood/digestive regulation), GABA (primary calming/inhibitory transmitter).
* **Brain Architecture & Stress Response**:
* *Amygdala*: Threat detection and fear processing.
* *Hippocampus*: Memory consolidation; vulnerable to chronic cortisol toxicity.
* *Parasympathetic Nervous System*: "Rest and digest" calming mediated by the vagus nerve (Cranial Nerve X).
* **Sleep Hygiene & Circadian Health**:
* REM sleep (dreaming, memory processing) vs. Stage 3 Slow-Wave deep sleep (glymphatic toxin clearance).
* 90-minute sleep cycles; natural morning sunlight sets the circadian timer for evening melatonin.
* **Evidence-Based Coping Strategies**:
* Cognitive Behavioral Therapy (CBT) for cognitive distortions (catastrophizing, all-or-nothing thinking).
* Breathing regulation: Box breathing (4-4-4-4) and the physiological sigh (double inhale, long exhale).
* **Neurochemistry & Hormones**:
* *Cortisol*: Primary glucocorticoid stress hormone released by adrenal cortex.
* *Melatonin*: Pineal hormone entrained by circadian darkness to signal sleep.
* *Neurotransmitters*: Dopamine (motivation/reward), Serotonin (mood/digestive regulation), GABA (primary calming/inhibitory transmitter).
* **Brain Architecture & Stress Response**:
* *Amygdala*: Threat detection and fear processing.
* *Hippocampus*: Memory consolidation; vulnerable to chronic cortisol toxicity.
* *Parasympathetic Nervous System*: "Rest and digest" calming mediated by the vagus nerve (Cranial Nerve X).
* **Sleep Hygiene & Circadian Health**:
* REM sleep (dreaming, memory processing) vs. Stage 3 Slow-Wave deep sleep (glymphatic toxin clearance).
* 90-minute sleep cycles; natural morning sunlight sets the circadian timer for evening melatonin.
* **Evidence-Based Coping Strategies**:
* Cognitive Behavioral Therapy (CBT) for cognitive distortions (catastrophizing, all-or-nothing thinking).
* Breathing regulation: Box breathing (4-4-4-4) and the physiological sigh (double inhale, long exhale).
Frequently Asked Questions
A glial-dependent waste clearance pathway in the brain that becomes up to ten times more active during deep sleep, flushing away metabolic toxins like amyloid-beta.
Translating to "a reason for being", it represents life purpose situated at the intersection of what you love, what you are good at, what the world needs, and what you can be paid for.
