Dopamine (Neurotransmitter)
A brain chemical involved in reward, motivation, attention, and pleasure. ADHD brains have lower baseline dopamine, driving sensation-seeking, impulsivity, and difficulty with non-rewarding tasks.
Dopamine is central to understanding ADHD, motivation, and personality. It's not the "pleasure chemical" — it's the "motivation chemical." Dopamine signals anticipated reward, driving you to pursue goals.
ADHD connection: ADHD brains have lower baseline dopamine activity. This creates: need for higher stimulation to engage (boring tasks are neurologically painful), sensation-seeking behavior (novelty generates dopamine), impulsivity (immediate rewards over delayed), and the hyperfocus paradox (interesting activities flood dopamine, creating intense engagement).
ADHD medication (stimulants) works by increasing dopamine availability in the prefrontal cortex — allowing the brain to engage with non-stimulating tasks. Exercise, novelty, and social connection also increase dopamine naturally.