{"id":363,"date":"2014-11-21T11:01:41","date_gmt":"2014-11-21T10:01:41","guid":{"rendered":"http:\/\/eportfolio.musikkons.dk\/wordpress\/bjoernpetersen\/?page_id=363"},"modified":"2021-03-15T15:17:13","modified_gmt":"2021-03-15T14:17:13","slug":"artikler","status":"publish","type":"page","link":"http:\/\/eportfolio.musikkons.dk\/wordpress\/bjoernpetersen\/artikler\/","title":{"rendered":"Article abstracts"},"content":{"rendered":"

2020<\/strong>
\nArtikel i Frontiers in Neuroscience om udvikling og validering af et nyt MMN-paradigme og\u00a0 erfarne CI-brugeres og normalth\u00f8rende kontrollers neurale og adf\u00e6rdsm\u00e6ssige skelnen af forskellige niveauer af afvigelse i intensitet, toneh\u00f8jde, klangfarve og rytme.<\/em><\/strong><\/p>\n

The CI MuMuFe \u2013 A New MMN Paradigm for Measuring Music Discrimination in Electric Hearing<\/a><\/p>\n

Bj\u00f8rn Petersen, Anne Sofie Friis Andersen, Niels Trusbak Haumann, Andreas H\u00f8jlund, Martin Dietz, Franck Michel, S\u00f8ren Kamaric Riis, Elvira Brattico, Peter Vuust
\nAbstract<\/strong>
\nCochlear implants (CIs) allow good perception of speech while music listening is unsatisfactory, leading to reduced music enjoyment. Hence, a number of ongoing efforts aim to improve music perception with a CI. Regardless of the nature of these efforts, effect measurements must be valid and reliable. While auditory skills are typically examined by behavioral methods, recording of the mismatch negativity (MMN) response, using electroencephalography (EEG), has recently been applied successfully as a supplementary objective measure. Eleven adult CI users and 14 normally hearing (NH) controls took part in the present study. To measure their detailed discrimination of fundamental features of music we applied a new multifeature MMN-paradigm which presented four music deviants at four levels of magnitude, incorporating a novel \u201cno-standard\u201d approach to be tested with CI users for the first time. A supplementary test measured behavioral discrimination of the same deviants and levels. The MMN-paradigm elicited significant MMN responses to all levels of deviants in both groups. Furthermore, the CI-users\u2019 MMN amplitudes and latencies were not significantly different from those of NH controls. Both groups showed MMN strength that was in overall alignment with the deviation magnitude. In CI users, however, discrimination of pitch levels remained undifferentiated. On average, CI users\u2019 behavioral performance was significantly below that of the NH group, mainly due to poor pitch discrimination. Although no significant effects were found, CI users\u2019 behavioral results tended to be in accordance with deviation magnitude, most prominently manifested in discrimination of the rhythm deviant. In summary, the study indicates that CI users may be able to discriminate subtle changes in basic musical features both in terms of automatic neural responses and of attended behavioral detection. Despite high complexity, the new CI MuMuFe paradigm and the \u201cno-standard\u201d approach provided reliable results, suggesting that it may serve as a relevant tool in future CI research. For clinical use, future studies should investigate the possibility of applying the paradigm with the purpose of assessing discrimination skills not only at the group level but also at the individual level.<\/p>\n

2017<\/strong><\/em>
\nArtikel i Hearing Research, der giver en oversigt over den forskningsm\u00e6ssige brug af Mismatch Negativity Response (MMN) til objektive m\u00e5linger af h\u00f8ret\u00e6skler i patienter med cochlear implantater.<\/strong><\/em><\/p>\n

The MMN as a viable and objective marker of auditory development in CI users<\/a><\/p>\n

Risto N\u00e4\u00e4t\u00e4nen, Bj\u00f8rn Petersen, Eila Lonka, Ritva Torppa, Peter Vuust<\/p>\n

Abstract
\n<\/strong>In the present article, we review the studies on the use of the mismatch negativity (MMN) as a tool for an
\nobjective assessment of cochlear-implant (CI) functioning after its implantation and as a function of time
\nof CI use. The MMN indexes discrimination of different sound stimuli with a precision matching with that
\nof behavioral discrimination and can therefore be used as its objective index. Importantly, these measurements
\ncan be reliably carried out even in the absence of attention and behavioral responses and
\ntherefore they can be extended to populations that are not capable of behaviorally reporting their
\nperception such as infants and different clinical patient groups. In infants and small children with CI, the
\nMMN provides the only means for assessing the adequacy of the CI functioning, its improvement as a
\nfunction of time of CI use, and the efficiency of different rehabilitation procedures. Therefore, the MMN
\ncan also be used as a tool in developing and testing different novel rehabilitation procedures. Importantly,
\nthe recently developed multi-feature MMN paradigms permit the objective assessment of
\ndiscrimination accuracy for all the different auditory dimensions (such as frequency, intensity, and
\nduration) in a short recording time of about 30 min. Most recently, such stimulus paradigms have been
\nsuccessfully developed for an objective assessment of music perception, too.<\/p>\n

2015
\nArtikel i Frontiers in Human Neuroscience<\/em> om musikalsk tr\u00e6ning med unge d\u00f8ve med cochlear implantater.<\/strong><\/p>\n

\n
\n

Brain Responses to Musical Feature Changes in Adolescent Cochlear Implant Users<\/a><\/p>\n<\/div>\n

Bj\u00f8rn Petersen, Ethan Weed, Pascale Sandmann, Elvira Brattico, Mads Hansen, Stine D. S\u00f8rensen\u00a0and Peter Vuust<\/div>\n

Abstract<\/strong>
\nCochlear implants (CIs) are primarily designed to assist deaf individuals in perception of speech, although possibilities for music fruition have also been documented. Previous studies have indicated the existence of neural correlates of residual music skills in postlingually deaf adults and children. However, little is known about the behavioral and neural correlates of music perception in the new generation of prelingually deaf adolescents who grew up with CIs. With electroencephalography (EEG), we recorded the mismatch negativity (MMN) of the auditory event-related potential (ERP) to changes in musical features in adolescent CI users and in normal-hearing age mates. EEG recordings and behavioral testing were carried out before (T1) and after (T2) a 2-week music training program for the CI users and in two sessions equally separated in time for normal-hearing (NH) controls. We found significant MMNs in adolescent CI users for deviations in timbre, intensity and rhythm, indicating residual neural prerequisites for musical feature processing. By contrast, only one of the two pitch deviants elicited an MMN in CI users. This pitch discrimination deficit was supported by behavioral measures, in which CI users scored significantly below the NH level. Overall MMN amplitudes were significantly smaller in CI users than in NH controls, suggesting poorer music discrimination ability. Despite compliance from the CI-participants, we found no effect of the music training, likely resulting from the brevity of the program. This is the first study showing significant brain responses to musical feature changes in prelingually deaf adolescent CI users and their associations with behavioral measures, implying neural predispositions for at least some aspects of music processing. Future studies should test any beneficial effects of a longer lasting music intervention in adolescent CI users.<\/p>\n

Artikel i\u00a0Neural Plasticity om CI-brugeres kortikale plasticitet i forb. rehabilitering umiddelbart efter implantation.<\/p>\n

Cortical Plasticity after Cochlear Implantation
\n<\/a><\/strong>Bj\u00f8rn Petersen, Albert Gjedde, Mikkel Wallentin and Peter Vuust<\/p>\n

Abstract<\/strong>
\nThe most dramatic progress in the restoration of hearing takes place in the firstmonths after cochlear implantation. To map the brain\u00a0activity underlying this process, we used positron emission tomography at three time points: within 14 days, three months, and six
\nmonths after switch-on. Fifteen recently implanted adult implant recipients listened to running speech or speech-like noise in four\u00a0sequential PET sessions at each milestone. CI listeners with postlingual hearing loss showed differential activation of left superior
\ntemporal gyrus during speech and speech-like stimuli, unlike CI listeners with prelingual hearing loss. Furthermore, Broca\u2019s area\u00a0was activated as an effect of time, but only in CI listeners with postlingual hearing loss. The study demonstrates that adaptation to
\nthe cochlear implant is highly related to the history of hearing loss. Speech processing in patients whose hearing loss occurred after\u00a0the acquisition of language involves brain areas associated with speech comprehension, which is not the case for patients whose
\nhearing loss occurred before the acquisition of language. Finally, the findings confirm the key role of Broca\u2019s area in restoration of\u00a0speech perception, but only in individuals in whom Broca\u2019s area has been active prior to the loss of hearing.<\/p>\n

2012
\nArtikel i Psychomusicology\u00a0<\/em>om musikalsk tr\u00e6ning med voksen CI-brugere
\n<\/strong>Singing in the Key of Life\u00a0<\/strong>– A Study on Effects of Musical Ear Training after Cochlear Implantation<\/a>
\nBj\u00f8rn Petersen, Malene Vejby Mortensen, Mads Hansen,\u00a0Peter Vuust<\/p>\n

Resum\u00e9<\/strong>
\nDocent Bj\u00f8rn \u201dB\u00f8nne\u201d Petersen har f\u00e5et publiceret en artikel I det amerikanske tidsskrift Psychomusicology: Music, Mind & Brain. Artiklen beskriver et studium, som unders\u00f8gte effekten af et seks m\u00e5neders individuelt musikalsk h\u00f8retr\u00e6ningsforl\u00f8b p\u00e5 opfattelsen af musik, tale og emotionel prosodi hos d\u00f8vblevne voksne med et s\u00e5kaldt cochlear implantat (CI). Atten nyopererede CI-brugere medvirkede i projektet – halvdelen som deltagere i den musikalske h\u00f8retr\u00e6ningsgruppe, den anden halvdel som deltagere i en kontrolgruppe. H\u00f8retr\u00e6ningen baserede sig dels p\u00e5 aktiv musikudfoldelse med fokus p\u00e5 sang og rytme, dels p\u00e5 computerbaserede lytte\u00f8velser udviklet til form\u00e5let. Unders\u00f8gelsen viste en markant forbedring af musikopfattelsen i almindelighed og evnen til at skelne klangfarve, melodisk kontur og rytme i s\u00e6rdeleshed, efter tr\u00e6ning. Der kunne ikke dokumenteres en effekt i forhold til taleforst\u00e5elsen, men evnen til at genkende emotionel prosodi udviklede sig signifikant hurtigere hos deltagerne i musikgruppen end hos kontrolgruppen. Alle deltagerne gennemf\u00f8rte programmet og viste stor begejstring for tr\u00e6ningen, navnlig sangaktiviteterne. Bj\u00f8rn og hans medforfatter konkluderer, at det beskrevne musikalske h\u00f8retr\u00e6ningsprogram kan udg\u00f8re et v\u00e6rdifuldt supplement til den auditive genoptr\u00e6ning som tilbydes nyopererede CI-brugere. B\u00e5de som bidrag til et forbedret udbytte af musik og en forbedret evne til at skelne finere detaljer i tale og dermed p\u00e5 sigt muligvis ogs\u00e5 en forbedret generel livskvalitet.<\/p>\n<\/div>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

2020 Artikel i Frontiers in Neuroscience om udvikling og validering af et nyt MMN-paradigme og\u00a0 erfarne CI-brugeres og normalth\u00f8rende kontrollers neurale og adf\u00e6rdsm\u00e6ssige skelnen af forskellige niveauer af afvigelse i intensitet, toneh\u00f8jde, klangfarve og rytme. The CI MuMuFe \u2013 A New MMN Paradigm for Measuring Music Discrimination in Electric Hearing Bj\u00f8rn Petersen, Anne Sofie Friis … Continue reading “Article abstracts”<\/span><\/a><\/p>\n","protected":false},"author":10,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":[],"_links":{"self":[{"href":"http:\/\/eportfolio.musikkons.dk\/wordpress\/bjoernpetersen\/wp-json\/wp\/v2\/pages\/363"}],"collection":[{"href":"http:\/\/eportfolio.musikkons.dk\/wordpress\/bjoernpetersen\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/eportfolio.musikkons.dk\/wordpress\/bjoernpetersen\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/eportfolio.musikkons.dk\/wordpress\/bjoernpetersen\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"http:\/\/eportfolio.musikkons.dk\/wordpress\/bjoernpetersen\/wp-json\/wp\/v2\/comments?post=363"}],"version-history":[{"count":25,"href":"http:\/\/eportfolio.musikkons.dk\/wordpress\/bjoernpetersen\/wp-json\/wp\/v2\/pages\/363\/revisions"}],"predecessor-version":[{"id":1058,"href":"http:\/\/eportfolio.musikkons.dk\/wordpress\/bjoernpetersen\/wp-json\/wp\/v2\/pages\/363\/revisions\/1058"}],"wp:attachment":[{"href":"http:\/\/eportfolio.musikkons.dk\/wordpress\/bjoernpetersen\/wp-json\/wp\/v2\/media?parent=363"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}