1. Department of Anatomy, Medical Faculty, Ondokuz Mayıs University, Samsun, Turkey.
2. Department of Neurosurgery, Medical Faculty, Ondokuz Mayıs University, Samsun, Turkey.
3. DDepartment of Anatomy, Medical Faculty, Ondokuz Mayıs University, Samsun, Turkey.
4. 112 Emergency Service Government Hospital, Samsun, Turkey.