Tinnitus alters resting state functional connectivity (RSFC) in human auditory and non-auditory brain regions as measured by functional near-infrared spectroscopy (fNIRS)
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{"title"=>"Tinnitus alters resting state functional connectivity (RSFC) in human auditory and non-auditory brain regions as measured by functional near-infrared spectroscopy (fNIRS)", "type"=>"journal", "authors"=>[{"first_name"=>"Juan San", "last_name"=>"Juan", "scopus_author_id"=>"57194551183"}, {"first_name"=>"Xiao Su", "last_name"=>"Hu", "scopus_author_id"=>"55496218100"}, {"first_name"=>"Mohamad", "last_name"=>"Issa", "scopus_author_id"=>"56959976700"}, {"first_name"=>"Silvia", "last_name"=>"Bisconti", "scopus_author_id"=>"37101069900"}, {"first_name"=>"Ioulia", "last_name"=>"Kovelman", "scopus_author_id"=>"23135247200"}, {"first_name"=>"Paul", "last_name"=>"Kileny", "scopus_author_id"=>"7005345764"}, {"first_name"=>"Gregory", "last_name"=>"Basura", "scopus_author_id"=>"6602408378"}], "year"=>2017, "source"=>"PLoS ONE", "identifiers"=>{"sgr"=>"85020735401", "pmid"=>"28604786", "pui"=>"616749241", "isbn"=>"1111111111", "scopus"=>"2-s2.0-85020735401", "doi"=>"10.1371/journal.pone.0179150", "issn"=>"19326203"}, "id"=>"96639234-96aa-35ae-a4b4-5c302471f727", "abstract"=>"Tinnitus, or phantom sound perception, leads to increased spontaneous neural firing rates and enhanced synchrony in central auditory circuits in animal models. These putative physiologic correlates of tinnitus to date have not been well translated in the brain of the human tinnitus sufferer. Using functional near-infrared spectroscopy (fNIRS) we recently showed that tinnitus in humans leads to maintained hemodynamic activity in auditory and adjacent, non-auditory cortices. Here we used fNIRS technology to investigate changes in resting state functional connectivity between human auditory and non-auditory brain regions in normal-hearing, bilateral subjective tinnitus and controls before and after auditory stimulation. Hemodynamic activity was monitored over the region of interest (primary auditory cortex) and non-region of interest (adjacent non-auditory cortices) and functional brain connectivity was measured during a 60-second baseline/period of silence before and after a passive auditory challenge consisting of alternating pure tones (750 and 8000Hz), broadband noise and silence. Functional connectivity was measured between all channel-pairs. Prior to stimulation, connectivity of the region of interest to the temporal and fronto-temporal region was decreased in tinnitus participants compared to controls. Overall, connectivity in tinnitus was differentially altered as compared to controls following sound stimulation. Enhanced connectivity was seen in both auditory and non-auditory regions in the tinnitus brain, while controls showed a decrease in connectivity following sound stimulation. In tinnitus, the strength of connectivity was increased between auditory cortex and fronto-temporal, fronto-parietal, temporal, occipito-temporal and occipital cortices. Together these data suggest that central auditory and non-auditory brain regions are modified in tinnitus and that resting functional connectivity measured by fNIRS technology may contribute to conscious phantom sound perception and potentially serve as an objective measure of central neural pathology.", "link"=>"http://www.mendeley.com/research/tinnitus-alters-resting-state-functional-connectivity-rsfc-human-auditory-nonauditory-brain-regions", "reader_count"=>15, "reader_count_by_academic_status"=>{"Unspecified"=>2, "Professor > Associate Professor"=>1, "Researcher"=>1, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>4, "Student > Postgraduate"=>1, "Other"=>2, "Professor"=>1, "Student > Bachelor"=>1}, "reader_count_by_user_role"=>{"Unspecified"=>2, "Professor > Associate Professor"=>1, "Researcher"=>1, "Student > Doctoral Student"=>2, "Student > Ph. D. Student"=>4, "Student > Postgraduate"=>1, "Other"=>2, "Professor"=>1, "Student > Bachelor"=>1}, "reader_count_by_subject_area"=>{"Engineering"=>3, "Unspecified"=>2, "Medicine and Dentistry"=>4, "Neuroscience"=>5, "Psychology"=>1}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>3}, "Medicine and Dentistry"=>{"Medicine and Dentistry"=>4}, "Neuroscience"=>{"Neuroscience"=>5}, "Psychology"=>{"Psychology"=>1}, "Unspecified"=>{"Unspecified"=>2}}, "group_count"=>1}

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