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On attended blocks subjects pressed a button after each sound indicating whether a single 40\u2009Hz AM pulse of variable increased amplitude (target, probability 0.67) had or had not occurred. On passive blocks subjects rested and ignored the sounds. The amplitude of the 40\u2009Hz auditory steady-state response (ASSR) localizing to primary auditory cortex (A1) increased with attention in control groups probed at 500\u2009Hz and 5\u2009kHz and in the tinnitus group probed at 500\u2009Hz, but not in the tinnitus group probed at 5\u2009kHz (128 channel EEG). N1 amplitude (this response localizing to nonprimary cortex, A2) increased with attention at both sound frequencies in controls but at neither frequency in tinnitus. We suggest that tinnitus-related neural activity occurring in the 5\u2009kHz but not the 500\u2009Hz region of tonotopic A1 disrupted attentional modulation of the 5\u2009kHz ASSR in tinnitus subjects, while tinnitus-related activity in A1 distributing nontonotopically in A2 impaired modulation of N1 at both sound frequencies.<\/jats:p>","DOI":"10.1155\/2014\/127824","type":"journal-article","created":{"date-parts":[[2014,6,12]],"date-time":"2014-06-12T18:18:30Z","timestamp":1402597110000},"page":"1-16","source":"Crossref","is-referenced-by-count":21,"title":["Modulation of Electrocortical Brain Activity by Attention in Individuals with and without Tinnitus"],"prefix":"10.1155","volume":"2014","author":[{"given":"Brandon T.","family":"Paul","sequence":"first","affiliation":[{"name":"Department of Psychology, Neuroscience & Behaviour, McMaster University, 1280 Main Street West, Hamilton, ON, Canada L8S 4K1"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ian 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