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A Cure for the Tyranny of Tinnitus? March 3, 2011 by Emma Filed under Tinnitus News Two recent studies provide hope for those afflicted with tinnitus, an annoying and sometimes debilitating ringing in the ears. One study shed light on a possible cause of the troubling disorder. The researchers, led by Josef Rauschecker of Georgetown University Medical Center in Washington, used high-tech MRI scans to zero in on areas of the brain linked to the phantom ringing. Dr. Rauschecker noted that tinnitus tends to occur in people who have suffered a loss of hearing in certain frequencies as a result of normal aging, loud-noise exposure or an accident. The brain, he said, tries to compensate for the partial hearing loss. “The neighbouring frequencies sort of expand into the gap,” he said, which results in the ringing sound. Anyone who has been to a rock concert or listened to music at an extremely high volume, will have noticed a ringing in the ears for a day or so. Eventually, though, the ringing disappears. But for people with tinnitus, the ringing persists. The MRI scans revealed that part of the brain (the ventromedial prefrontal cortex) that would normally turn off or cancel out the ringing is unusually small in people with tinnitus. “Hopefully, we can find some therapies [to treat tinnitus] that are based on this new knowledge,” said Dr. Rauschecker, whose study was published in the journal Neuron. In the second study, researchers at the University of Texas and MicroTransponder Inc. in Dallas, report they were able to eliminate tinnitus in rats by stimulating the vagus nerve in the neck while simultaneously playing a variety of sound tones over an extended period of time. They compared their novel therapy to hitting a “reset button” that basically retrains a part of the brain that interprets sounds. Their findings were published in the journal Nature. Dr. Rauschecker said, in some respects, the two research papers are “highly” complementary. “The vagus nerve stimulation they used could well exert its effects … [through] the same structures we found to be involved in tinnitus.”
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A Cure chun tyranny de tinnitus? Márta 3, 2011 ag Emma Comhdaithe faoi Tinnitus Nuacht chur ar fáil dhá staidéar le déanaí tá súil dóibh siúd a bhfuil tinnitus afflicted, an annoying agus uaireanta debilitating ringing sa chluasa. Staidéar amháin chaillfidh bhfianaise ar chúis is féidir ar an neamhord troubling. An taighdeoirí, faoi cheannas Rauschecker Josef ar Georgetown Ionad Ollscoil Leighis i Washington, úsáidtear MRI scans ardteicneolaíochta a náid i maidir le réimsí den inchinn nasctha leis an phantom glaoch. An Dr. Rauschecker faoi deara go bhfuil claonadh tinnitus a tharlódh i daoine a d'fhulaing caillteanas éisteachta i minicíochtaí áirithe mar thoradh ar an gnáth aois, Ard-torann nochta nó timpiste. An inchinn, he said, iarracht chun cúiteamh a dhéanamh i leith an chaillteanais éisteachta páirteach. “An comharsanacha minicíochtadúirt sés leathnú isteach sa bhearna,” he said, a bhfuil mar thoradh ar an fhuaim glaoch. Duine ar bith a bhfuil curtha chuig ceolchoirm carraig nó ag éisteacht le ceol ar líon an-ard, Beidh faoi deara le glaoch ar an ears ar feadh lae nó mar sin. Faoi dheireadh, cé go, glaoch ar an disappears. Ach do dhaoine le tinnitus, glaoch ar an mhaireann. An MRI scans Léirigh an chuid sin den inchinn (prefrontal cortex ventromedial) a bheadh cas de ghnáth as nó a chealú amach an bhfuil glaoch unusually beag daoine le tinnitus. “Táimid dóchasach go, is féidir linn teacht ar roinnt teiripí [a tinnitus chóireáil] atá bunaithe ar an eolas nua a,” Dúirt an Dr. Rauschecker, Foilsíodh a bhfuil staidéar ar an iris néaróin. Sa dara staidéar, taighdeoirí ag Ollscoil Texas agus MicroTransponder Inc. in Dallas, tuarascáil a raibh siad in ann deireadh a chur tinnitus i bhfrancaigh ag spreagadh an néaróg vagus sa mhuineál agus iad ag imirt ag an am céanna éagsúla toin fuaime thar thréimhse fhada ama. gcomparáid siad a n-teiripe úrscéal le bualadh le “cnaipe athshocrú” go retrains fuaimeanna bunúsach mar chuid den inchinn a interprets. Foilsíodh a gcuid torthaí san iris Nature. An Dr. Dúirt Rauschecker, bhealaí áirithe, Is iad an dhá pháipéar taighde “an-” chomhlántach. “An spreagadh nerve vagus a úsáidtear iad na hiarmhairtí a d'fhéadfadh exert maith ... [trí] na struchtúir chéanna fuair muid a bheith páirteach i tinnitus.”