No abstract

This work is licensed under Creative Commons Attribution 4.0 License ANN.MS.ID.000728.

There are some inner ear disorders which cause conductive or mixed hearing loss including Third_ window and non_ Third window disorders. In Third_ window hypothesis, conductive hearing loss may occur because of the Third_ window which is created except for the Round and Oval windows. The air bone gap mechanism in non-Third window disorders is unknown. We deal with this subject in this paper by mentioning some tests which are useful for differential diagnosis.

This work is licensed under Creative Commons Attribution 4.0 License ANN.MS.ID.000788.

There are some studies which confirmed that dysfunction in Central Nervous System(CNS) may cause a malfunction in the Peripheral Auditory system (Cochlea_ Auditory Nerve, Auditory Neuropathy), but the question is could Brain Disorder without any lesion in the Cochlea and/or Auditory nerve cause Sensorineural Hearing Loss? It means that the Audiogram shows that the patient suffers from sensorineural hearing loss but the site of the lesion is neither Sensory nor Neural while Brain may be involved in charge of this. And if the answer is yes then could we hear with our Brain and without Cochlea and /or Auditory nerve? We deal with this subject in this paper by: Otosclerosis and Meniere’s disease and The Brain Involvement. Hearing Loss following dysfunction in the Central Auditory and/or central non auditory system. Auditory Brainstem Implant in Patients who suffer from Neurofibromatosis Type two compare to Non Tumor cases, Mondini Syndrome, Michel aplasia. Possible role of Utricle and Saccule in Auditory (Hearing) System We propose a new Hypothesis that the External Ear Canal is not the only input of Auditory Signals, Sounds could transfer by our eyes and skin to the Cerebral Cortex and approach to the Cochlea (Backward Auditory input pathway of Sounds).