“Nose” Body Language

Body language starts in the brain, of course, and can reveal a variety of things about you when others are watching. According to psychologist Michael Cunningham, a professor of communication at the University of Louisville, your blood pressure tends to rise when you are telling a lie. Tiny blood vessels in your nose known as capillaries tend to dilate as your blood pressure rises, allowing more blood to flow through them. Lying can also trigger an adrenalin rush that dilates nose capillaries. Increased blood flow can make your nose feel itchy, which prompts you to touch it. (Typically, you rub your nose more vigorously when you have a genuine nose itch unrelated to lying.) If the person you are talking with knows this piece of brain trivia and you are touching your nose often, it might suggest deception. An exception might be a sociopath whose brain fails to register truth from fiction, so blood pressure might not rise or there may be no adrenalin rush.

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