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
Facial feminization surgery face into a female face; he pioneered most of the procedures involved in FFS and was involved in their subsequent improvements as well. As of 2006, there were about twelve surgeons globally who specialized in FFS. In the US as of 2006, the procedure cost between $20,000 and $40,000, about twice the cost of sexual reassignment surgery. In Europe prices are considerably lower. As of 2017 between €10.000 and €25.000 for a complete FFS. Facial feminization surgery Facial feminization surgery (FFS) is a set of cosmetic surgical procedures that alter typically male facial features to bring them closer in shape