1. AP-HM, Timone Hospital, Functional and Stereotactic Neurosurgery, Marseille, France;
2. Aix Marseille Univ, INSERM, INS, Inst Neurosci Syst, Marseille, France;
3. Centre Hospitalier Universitaire Vaudois (CHUV), Neurosurgery Service and Gamma Knife Center, Lausanne, Switzerland;
4. Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland;
5. Signal Processing Laboratory (LTS 5), École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland;
6. AP-HM, North University Hospital, Department of Neurosurgery, Marseille, France;
7. Department of Head and Neck Surgery, AP-HM, Timone Hospital, Marseille, France