What muscle extends from the cheekbones to the angles of the mouth and elevates the lip when laughing?

The zygomaticus muscle is responsible for elevating the upper lip and pulling the corners of the mouth upwards, primarily during smiling and laughing. This muscle connects from the zygomatic bone, which is the bone of the cheek, to the angles of the mouth. When the zygomaticus contracts, it allows for expressions of happiness and joy, making it an essential muscle for facial expressions.

Understanding the function of this muscle is important in esthetics, particularly regarding treatments that may impact facial appearance or expressions. Its role in elevating the lip and facilitating a smile emphasizes the zygomaticus's contribution to the overall aesthetics of the face.