| CHAPTER 
                                        TWOCauses of Tinnitus
 Paul R. 
                                        Kileny, PhD
 Tinnitus is a common 
                                        symptom, not a disease. Because tinnitus 
                                        is the perception of sound, it is closely 
                                        associated with the hearing system. Thus, 
                                        there is an anticipation that it is caused 
                                        by problems and disease processes affecting 
                                        one or more parts of the ear or the nerve 
                                        pathways associated with hearing. Indeed 
                                        various parts of the hearing system are 
                                        often responsible for the symptom of tinnitus. 
                                        There are cases where a direct link may 
                                        be established between some type of hearing 
                                        problem and the appearance and presence 
                                        of tinnitus. Other times, there may not 
                                        be a readily identifiable problem affecting 
                                        the different components of the hearing 
                                        system. In some situations, problems affecting 
                                        other parts of the human organism can 
                                        also result in tinnitus. This can be important 
                                        because in some cases when the other ailment 
                                        is treated, the tinnitus can disappear. 
                                        However, other times, the tinnitus may 
                                        persist after the most likely cause has 
                                        been treated or has resolved. The Anatomy 
                                        of Tinnitus Perhaps a better way 
                                        of thinking about tinnitus is by which 
                                        specific anatomical site of the hearing 
                                        system might cause this symptom. Thus, 
                                        we may want to consider sites such as 
                                        the ear canal, the middle ear, inner ear 
                                        and central auditory pathways. This way 
                                        of thinking about tinnitus parallels how 
                                        we think of diagnosing hearing loss. The 
                                        advantage of this approach to tinnitus 
                                        is that it may relate better to specific 
                                        causes and may ultimately relate better 
                                        to specific treatments. 
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