Soandso
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If anyone is wondering where the tinnitus sound comes from inside the brain a proposed location is the para-hypothalamus. It is a brain component associated with accuracy of sound frequencies (as best I recall).
The linkage is prior sound which the para-hypothalamus processed gets reproduced creating the "auditory hallucination" that it is being heard. One rational for this being a prior sound evocation is that deafness from birth in one ear with subsequent tinnitus in the hearing ear results in no tinnitus on the side of the ear deaf from birth.
I have not come across anything about why the para-hypothalamus draws up any specific sound frequency for tinnitus and not some other frequency. One research team makes a convoluted explanation that I'll just say amounts to tinnitus being futile cycles of auditory neurons "re-booting" for balance. If so, then conceivably in the para-hypothalamus archive of sounds heard by us there are frequencies with an archaic evolutionary link akin to "tuning up" accurately.
Some discuss stress and/or emotional components contributing to tinnitus episodes. There are neural auditory pathways linking the hypothalamus to the amygdala which would explain why some say relaxation improves their tinnitus. I surmise there is something like a neural feedback loop from the amygdala back to the hypothalamus and thence the para-hypothalamus, which then stops it's piping up.
The development of tinnitus is not always associated with one kind of cause. And for that matter not every tinnitus progressively affects the brain similarly.
However, in some tinnitus cases over time our brain's plasticity has been shown to undergo selective neural pathway(s) re-wiring. The variable ranges of neural changes, in what I'll call chronic tinnitus, probably account for different manifestations of tinnitus intractability among sufferers.
Sorry, no citations at hand right now to add here.
The linkage is prior sound which the para-hypothalamus processed gets reproduced creating the "auditory hallucination" that it is being heard. One rational for this being a prior sound evocation is that deafness from birth in one ear with subsequent tinnitus in the hearing ear results in no tinnitus on the side of the ear deaf from birth.
I have not come across anything about why the para-hypothalamus draws up any specific sound frequency for tinnitus and not some other frequency. One research team makes a convoluted explanation that I'll just say amounts to tinnitus being futile cycles of auditory neurons "re-booting" for balance. If so, then conceivably in the para-hypothalamus archive of sounds heard by us there are frequencies with an archaic evolutionary link akin to "tuning up" accurately.
Some discuss stress and/or emotional components contributing to tinnitus episodes. There are neural auditory pathways linking the hypothalamus to the amygdala which would explain why some say relaxation improves their tinnitus. I surmise there is something like a neural feedback loop from the amygdala back to the hypothalamus and thence the para-hypothalamus, which then stops it's piping up.
The development of tinnitus is not always associated with one kind of cause. And for that matter not every tinnitus progressively affects the brain similarly.
However, in some tinnitus cases over time our brain's plasticity has been shown to undergo selective neural pathway(s) re-wiring. The variable ranges of neural changes, in what I'll call chronic tinnitus, probably account for different manifestations of tinnitus intractability among sufferers.
Sorry, no citations at hand right now to add here.