Ключевые слова: anger, anxiety, art, brain, burnout, business, cephalalgia, chaos, concept, continuous, contour, depressed, despair, disorder, doodle, emotion, expression, face, head, headache, health, human, illustration, intelligence, isolated, line, linear, lineart, mental, mind, outline, pain, person, portrait, problem, profile, sad, science, sign, silhouette, stress, symbol, therapy, thinker, thought, trouble, unhappy, work,