The occurrence of the Tullio phenomenon in congenitally deaf children.
One hundred and fifty deaf children between 5 and 16 years old of the 'Rudolf Mees' Institute were investigated in search of the Tullio phenomenon with nystagmus as a criterion. Seventy-six out of those 300 ears were positive. A functioning (calorically excitable) pars superior of the labyrinth was a 'conditio sine qua non' for this reflex. We may assume that deaf ears which show a positive Tullio phenomenon have a labyrinthine pathology of the Mondini-Alexander type and that this symptom is a pathologic one.
D000293:Adolescent; D000818:Animals; D002648:Child; D002675:Child, Preschool; D003638:Deafness / Q000151:congenital* / Q000503:physiopathology; D007758:Ear, Inner / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D009759:Nystagmus, Pathologic / Q000503:physiopathology*; D011817:Rabbits; D012018:Reflex; D013016:Sound; D014732:Vibration