Which muscle is not affected by a brow lift?

In the context of a brow lift, the primary focus is on the muscles responsible for the movement and positioning of the eyebrows and forehead. The corrugator supercilii, frontalis, and orbicularis oculi are all muscles that play roles in facial expression around the brow region.

The corrugator supercilii assists in frowning by drawing the eyebrows together, while the frontalis is responsible for raising the eyebrows and creating forehead wrinkles. The orbicularis oculi contributes to eyelid closure and can influence the appearance of the brow area as well. During a brow lift procedure, the tension and positioning of these muscles can be affected to achieve the desired aesthetic result.

On the other hand, the risorius is a muscle located in the lower part of the face that helps in retracting the corners of the mouth. Since this muscle does not have an anatomical or functional role in the movement of the forehead or eyebrows, it remains unaffected by interventions aimed at lifting the brow. Therefore, it is accurate to state that the risorius is not impacted during a brow lift procedure, distinguishing it from the other muscles which are directly involved in brow and forehead dynamics.