Does the frontalis attach to the modiolus?

The frontalis muscle, which is responsible for raising the eyebrows and expressing surprise, does not attach to the modiolus. The modiolus is a fibrous structure located at the corner of the mouth and serves as an anchoring point for several muscles relevant to facial expression. The frontalis primarily connects to the skin and underlying connective tissues of the forehead, and therefore is not directly associated with the modiolus. This anatomical distinction is essential for understanding both the function and the interactions of facial muscles.