Facial expression responsible for controlling the expression differ in each case. Voluntary facial expressions are often socially conditioned and follow a cortical route in the brain. Conversely, involuntary facial expressions are believed to be innate and follow a subcortical route in the brain. Facial recognition is often an emotional experience for the brain and the amygdala is highly involved in the recognition process. The eyes are often viewed as important features of facial expressions. Aspects such as blinking rate can possibly be used to indicate whether a person is nervous or whether he or she is lying. Also, eye contact is considered
Separated at birth physical similarities to humorous effect. There were several "Separated at Birth?" books issued around the same time, with whimsical comparisons such as Mick Jagger vs. Don Knotts as the fictional film character "The Incredible Mr. Limpet". Separated at birth Separated at birth, usually phrased as a question, is a light-hearted media device for pointing out people who are unrelated but bear a notable facial resemblance, implying that they are twins who were separated soon after being born and presumably adopted by separate families. The title "Separated at Birth?" was a trademark of Spy Publishing Partners, the publishers of the now