Why is Tinnitus so annoying?
Journal Title: Biomedical Journal of Scientific & Technical Research (BJSTR) - Year 2017, Vol 1, Issue 4
Abstract
Animals have their hearing as a warning system for the first line of defence, which raises the alert. In humans, except from the basic innate “animal” reactions, we have our thoughts and feelings, with our sentiments and communication between people predominating. There is a short interval between the detection of sound by the cochlea and the perception of sound by the auditory cortex. However, during this time many types of interactions take place. A quarter of a second is a long time for a fast computer, but for our brains as well. Humans not only hear the sound, but can also be affected both physically and emotionally in many ways. There is no human being who has not felt the pleasant, striking feeling on his back at the sound of a charming music. We do not fully know the connections and interactions between the auditory tract and other parts of the brain. The way we operate is even less understood. Suffice it to say that abnormal electrical activity at any point from the cochlea up to close to the auditory cortex can have many different effects between them. The changes in electrical activity occurring for any reason on the acoustic path are perceived by the brain as sound, even though there is no new sound in the environment. The auditory cortex “does not recognize” that this activity is not external. It just processes it as sound. Similarly, the brain stem does not know that this new electrical activity is not a threat; it simply reacts as if it were a threat. Compare this to what would happen if someone were to hit you in the eye: besides the pain, you would almost certainly see a glow. They wouldn’t have shined a light on the eye, but the difference in electrical activity in the visual system is perceived by the visual cortex as “light”. In classic migraine, where the blood flow in the visual cortex is impaired, the flashes are common experience.
Authors and Affiliations
Constantinos Avraamides
Keywords
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- EP ID EP570990
- DOI 10.26717/BJSTR.2017.01.000375
- Views 171
- Downloads 0
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