Lexical measures use individual adjectives that reflect extrovert and introvert traits, such as outgoing, talkative, reserved and quiet.
en.wikipedia.org Extroverts have more blood flow in the anterior cingulate gyrus, temporal lobes, and posterior thalamus, which are involved in sensory and emotional experience.
en.wikipedia.org Like his paintings, books, articles, plays and performances, his artwork reflected his extrovert nature and lively imagination.
en.wikipedia.org His more balanced and normal personality makes him an everyman type character, contrasting the generally extroverted people with whom he works.
en.wikipedia.org Depending on the orientation of one's consciousness, introverted or extroverted, emission can be of two kinds: rested and risen.
en.wikipedia.org