None
Chronic stress alters brain connectivity. Managing the cortisol curve is the foundation of wellbeing.
GABA is the main braking system of the brain. Understanding its role in anxiety, sleep, and alcohol dependence clarifies a great deal about how the nervous system regulates itself.
Whether you are a morning person or a night owl is not a character trait. It is a biological reality determined by genetics, age, and light exposure - and fighting it has real costs.
The adult brain is far more malleable than was believed a generation ago. But not all changes are equal - understanding which neural changes are realistic sets appropriate expectations.
The "runner high" was attributed to endorphins for decades. Recent research suggests endocannabinoids are the primary driver. The distinction matters for how we think about exercise and mood.
Oxytocin is widely called the "love hormone." The reality is more complex - it enhances trust and affiliation within groups while potentially increasing out-group suspicion. Understanding its nuance is essential.
Dopamine gets all the attention, but norepinephrine is equally important for focus, alertness, and stress response. Understanding it changes how you approach attention and arousal.