Stereotaxy is a highly accurate technique and procedure based on the Cartesian coordinates X, Y and Z, performed with a stereotactic frame fixed on patient head. There are different types of stereotactic arcs. In Latin America, one of the most used model is the Micromar brand, a model developed along with prof. Dr. Manoel Jacobsen Teixeira, of Sao Paulo Hospital das Clinicas. Other models used are ZD, Riechter-Moundinger, Leksell, Talairach, among others. For the stereotactic surgical procedure, which allows millimetric precision in the cerebral incision, we created Aimsystem, our Stereotactic System with more than 30 years of tradition, in addition to its stereotactic disposable sets.