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¹İstanbul Eğitim ve Araştırma Hastanesi Beyin ve Sinir Cerrahisi Kliniği, İstanbul,Türkiye
²Dr. Lütfi Kırdar Kartal Eğitim ve Araştırma Hastanesi Beyin ve Sinir Cerrahisi Kliniği, İstanbul, Türkiye
³İstanbul Esenyurt Üniversitesi, Esencan Hastanesi Beyin ve Sinir Cerrahisi Kliniği, İstanbul, Türkiye Herniations of the cerebellar tonsils through the foramen magnum causes a variety of symptoms from occipitonuchal headache to muscle weakness as a result of obstruction of cerebrospinal fluid (CSF) outflow and compression of neural tissue. There is no single objective test or diagnostic method to diagnose symptomatic Chiari type I malformation. The decision of the physician is determined by his/her own experience and judgment. Tonsillar compression is the key anatomic imaging finding on sagittal magnetic resonance imaging (MRI). Using Cine-MRI is restricted by the complexity of the CSF flow pattern. Electrodiagnostic tests such as evoked potentials are used as an advanced neurological evaluation method. Anahtar Kelimeler : Cerebellar tonsil, Chiari type I, Cine Magnetic resonance imaging, CSF flow dynamic, Evoked potential