Upper third of the face

This chapter describes the treatment protocols for each of the abovementioned muscles, respecting the balance of the eyebrows. If needed, the dose can be increased in the upper forehead at follow-up visits to further reduce muscle strength. Pre-treatment assessment of the upper face, grading of wrinkles, muscle strength, and patient request for eyebrow shape and positioning will determine the dosage for each injection points. Treatment consists of the injection of 1-2 U/2.5-5 sU in the fibers of the lateral frontalis muscle. Muscles of facial expression maintain a balance of the mimetic movements in the face. In the upper third of the face, there are two types of muscles: levators and depressors. The injections are performed intradermally and also have an effect on the frontalis muscle. The dose and injection points remain the same, more points can be added to assure a homogeneous distribution of the product.