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02.07.2015

Tinnitus brain surgery, tinnitus relief pillow - For You

Author: admin
In a revolutionary series of experimental surgeries, Michael Seidman, MD, and his team have now shown that an electrode array implanted directly into the auditory cortex area of the brain can control tinnitus levels. Author’s note: Neural hyperactivity in the auditory cortex has long been associated with tinnitus.
Upon recovering from surgery, at the first post-operative visit, the selection of the electrical stimulating paradigm, or model, was decided for each patient.
Each patient was followed at 1 week, 1 month, 3 months, 6 months and 12 months after surgery. It is important to note that initially the effect was greater for the opposing ear but subsequently it had effectively eliminated the tinnitus in both ears. High resolution MRI revealed a microvascular compression at the entrance of her spine into the brainstem.
Four months later, MV underwent transcranial magnetic stimulation, which suppressed her tinnitus by 20-50% but did not last for any appreciable time. Four months after the original surgery, MV underwent further surgery to replace the four-contact electrode array with two two-contact arrays. Two patients underwent intracranial electrical stimulation of their auditory cortex in an attempt to reduce or eliminate tinnitus. Author’s Note: The limbic system is the part of the brain responsible for pleasure, emotions, sexual arousal and fear. It has been suggested that tinnitus can be affected through cortical and auditory pathway stimulation, provided that reorganization of auditory signals has not yet reached the ultimate phase of irreversibility. Gander, PhD, from University of Iowa, examined the patient’s brain activity during periods when tinnitus was relatively stronger and weaker. Early experiments using DC current applied directly to the ear or mastoid bone showed promise in reducing tinnitus symptoms.


118 in March, 2008 with the title Direct Electrical Stimulation of Heschl’s Gyrus for Tinnitus Treatment by Michael D.
Seidman begins by noting that tinnitus affects 50 million Americans and more than 300 million people worldwide. Seidman first experimented on animals to examine whether electrical stimulation of the auditory cortex suppresses tinnitus-related neural hyperactivity and found it to be effective. These determined the hearing levels at precise frequencies and pitch and loudness matching of their tinnitus. The skull was breached and electrodes were implanted in the opposing auditory cortex for the patient who had unilateral tinnitus and in the dominant ear of the patient who had bilateral tinnitus. Three months after surgery he reported his tinnitus was essentially gone when the electrode was active and recurred only several days after turning the device off. Seven years after she developed her tinnitus, a microvascular decompression was performed and resulted in successfully treating her vertigo but failed to reduce her tinnitus. By altering the stimulation paradigm, she eventually had a 30% to 35% reduction in her tinnitus. In patient one, the suppression of tinnitus was near complete, whereas in the other, it was moderate and did not last.
The primary pitfall is determining which “structures” (areas of the brain) to target to minimize the perception of tinnitus. It is known that the limbic system plays a major role in the annoyance and aggravation of tinnitus.
This implies that tinnitus should be treated as soon as possible, preferably within 5 years of onset. Implanted electrodes used to control muscle spasms in Parkinson’s disease patients were found to reduce the sound of tinnitus, even though they were not implanted in the auditory cortex, where hearing occurs.


The tinnitus would return when the electrode was off for 30-60 seconds and would decrease significantly when the electrode was active. Several subsequent stimulation regimens applied over the succeeding 4 months failed to adequately diminish her tinnitus. However at her 2-year follow-up examination, her tinnitus had returned to its original levels. Whether this was due to the more longstanding nature of patient two’s tinnitus or to another reason is still unknown.
Gander explained that it is rare that a person requiring invasive electrode monitoring for epilepsy also has tinnitus.
The first surgery was performed at the Henry Ford Health System in Detroit, MI and the second surgery was performed in Antwerp, Belgium. Two years after the accident, a sudden left-sided tinnitus developed and was associated with short-lasting spells of vertigo. Whether stimulation of the primary auditory cortex will have the greatest effect in alleviating the perception of tinnitus or whether stimulation of other structures, such as those within the limbic system, will have the greatest effect requires further study.
Electrical stimulation of the skin near the ear, cochlea and brainstem has also provided some degree of tinnitus suppression.
A prior article discussing the early history of electrical stimulation can be found in our Tinnitus Library.



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