Lip Pursing: An Overview Lip pursing is a facial expression that is commonly seen in humans and other primates. It is a common response to a variety of situations and is associated with both positive and negative affective states. The purpose of this paper is to provide an overview of the phenomenon of lip pursing […]
Introduction and Anatomical Overview The facial muscles, known scientifically as the muscles of facial expression (mimetic muscles) and the muscles of mastication, constitute a highly specialized group of skeletal muscles critical for human communication, physiological function, and social interaction. Unlike most skeletal muscles that connect bone to bone via tendons, the defining characteristic of the […]