Concealed emotions, also called facial "microexpressions", are the fleeting expressions

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that, believe it or not, you make when consciously or unconsciously trying to hide your true emotions. In conscious microexpressions you may be trying to lie, while with unconscious expressions, you may not even be aware of what they are truly feeling.Paul Ekman, Ph.D. has made a study of these microexpressions. According to Ekman, "These expressions tend to be very extreme and very fast. Eighty to 90 percent of people we tested don't see them."Ekman was a Professor of Psychology in the Department of Psychiatry at the University of California at San Francisco for 32 years. His original focus was on "nonverbal" behavior, and by the mid-60s, he concentrated on the expression and physiology of emotion. He has developed a secondary interest in interpersonal deception as well.  Alpha ZXT Perhaps his most famous publication is the The Facial Action Coding System (FACS) which is used by law enforcement and intelligence agencies everywhere, as well as parents and therapists who want to be able to understand people around them better."With my children, spouse, friends and work associates, if I don't understand how they're feeling - either about me or about (things) that may have nothing to do with me when we interact - then I'm not going to have a very useful exchange with them,"  http://www.musclegainhelp.com/neuro3x/