When performing aesthetic treatments with botulinum toxin, understanding the dynamics of facial muscles is crucial.
The forehead is primarily controlled by the frontalis muscle, which elevates the eyebrows. When botulinum toxin is used here, the muscle relaxes, smoothing out wrinkles and lines. However, if the glabella (the area between the eyebrows) is not also addressed, it can lead to an imbalance in facial expression.
The glabella comprises muscles like the corrugator supercilii and procerus, which are responsible for frowning and creating vertical lines. If these muscles remain active while the frontalis is relaxed, it can cause a heavy or drooping effect on the brow. This happens because the untreated glabellar muscles pull the brows downward, countering the lifting effect usually provided by the frontalis.
Injecting the glabella helps to achieve a more harmonious and balanced result. It prevents the formation of deep frown lines and ensures that the brow does not appear heavy or droopy after treatment. By relaxing the muscles in this region, it supports a natural, refreshed appearance, enhancing the overall aesthetic outcome.
Moreover, treating both areas can help maintain a more consistent look. Patients often seek a smooth forehead, but if the glabella is left untreated, it may still show lines and movement that contrast with the smoothness of the forehead, leading to an inconsistent appearance.
