Q: What exactly are urban legends? A: Urban legends are popular stories alleged to be true and passed from individual to individual via oral or written (e.g. forwarded email) communication.: What exactly are urban legends? A: Urban legends are popular stories alleged to be true and passed from individual to individual via oral or written (e.g. forwarded email) communication.
When a person gets injured, their brains release chemicals called opioids into the space between neurons that acts to dull the pain signals. The effect is seen the most in the brain regions called the ventral striatum, amygdala, midline thalamus, and periaqueductal gray.
Catecholamines are the chemicals released by your brain, nerve cells, and adrenal glands that act as modulators of the stress response, also known as the fight-or-flight response. Three commonly known ones are epinephrine (adrenaline), norepinephrine, and dopamine.