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
Emerging adulthood and early adulthood they want to, but because they cannot afford a life of their own: They experience a period of "arrested adulthood". A more theoretical criticism comes from developmental psychologists, who regard all stage theories as outdated. They argue that development is a dynamic interactive process, which is different for every individual, because every individual has their own experiences. Inventing a stage that only describes (not explains) a time period in the life of a few individuals (mostly white middle class young people living in Western societies within this decade), and has nothing to say about people living in different conditions or