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 toning muscle exercising. There are two types of facial toning exercises: active and passive face exercises. Face exercises involves repeated voluntary contractions of certain facial muscle groups. The effectiveness of these facial toning techniques in improving appearance is scientifically unproven. Passive exercising by direct skeletal muscle electrostimulation. In this, flat metal electrodes with a conductive gel are affixed to certain points in the face and electrostimulation causes facial muscle contractions. Facial toning Facial toning, or facial exercise is a type of cosmetic procedure or physical therapy tool which promises to alter facial contours by means of increasing muscle tone, and facial