Keywords: هسته آمبیگوس; 12N; hypoglossal nucleus; 2n; optic nerve; 3N; oculomotor nucleus; 3V; third ventricle; 4V; fourth ventricle; 4n; trochlear nerve; 5N; motor trigeminal nucleus; 6N; abducens nucleus; 7N; facial nucleus; ac; anterior commissure; Amb; ambiguus nucleus; cp;