Cortical mechanisms of talker normalization in fluent sentences.
Brain Lang
; 201: 104722, 2020 02.
Article
em En
| MEDLINE
| ID: mdl-31835154
ABSTRACT
Adjusting to the vocal characteristics of a new talker is important for speech recognition. Previous research has indicated that adjusting to talker differences is an active cognitive process that depends on attention and working memory (WM). These studies have not examined how talker variability affects perception and neural responses in fluent speech. Here we use source analysis from high-density EEG to show that perceiving fluent speech in which the talker changes recruits early involvement of parietal and temporal cortical areas, suggesting functional involvement of WM and attention in talker normalization. We extend these findings to acoustic source change in general by examining understanding environmental sounds in spoken sentence context. Though there may be differences in cortical recruitment to processing demands for non-speech sounds versus a changing talker, the underlying mechanisms are similar, supporting the view that shared cognitive-general mechanisms assist both talker normalization and speech-to-nonspeech transitions.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Percepção da Fala
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Córtex Cerebral
Limite:
Adult
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Female
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Humans
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Male
Idioma:
En
Revista:
Brain Lang
Ano de publicação:
2020
Tipo de documento:
Article