Virginia Permanent Makeup (PMU) State Board Practice Exam

The primary function of the corrugator muscle is to draw the eyebrow down and create vertical wrinkles in the forehead. This muscle is located near the inner corner of the eyebrow, and its contraction causes the eyebrows to move together and downward, typically expressing emotions such as anger or concentration. This action results in the formation of furrows or lines on the forehead, which is a characteristic feature associated with certain facial expressions. Understanding the function of this muscle is crucial in fields like permanent makeup, where knowledge of facial anatomy informs techniques for enhancing or correcting features through cosmetic procedures.