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An fMRI study on auditory selective attention in diotic listening paradigm-463.25
https://repo.qst.go.jp/records/62906
https://repo.qst.go.jp/records/62906fbec3655-b10d-4cc7-ab4d-690097475fec
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2008-12-09 | |||||
| タイトル | ||||||
| タイトル | An fMRI study on auditory selective attention in diotic listening paradigm-463.25 | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Ikeda, Yumiko
× Ikeda, Yumiko× Yahata, Noriaki× Takahashi, Hidehiko× Koeda, Michihiko× Okubo, Yoshiro× Suzuki, Hidenori× 高橋 英彦× 大久保 善朗 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Selective listening is an essential auditory process that enables one to attend to the speech of a certain speaker among a mixture of parallel conversations, a phenomenon known as the cocktail party effect. Early experimental psychology in this area has long employed a so-called dichotic listening paradigm, where the subjects were typically presented with a set of monotonic tones, distinct to each ear, and were instructed to identify a target tone. The experimental setting of such a paradigm is, however, conceptually far from that we experience in daily life. Here, we instead developed an experimental paradigm based father on actual human conversation, and thereby investigated neural network underpinning the selective listening function in more realistic auditory settings. Twenty healthy volunteers (mean age 24.9 years) participated in the following experimental session, during which their cerebral hemodynamic activities were recorded by functional magnetic resonance imaging (fMRI). In a single fMRI session, the subjects were presented with auditory stimuli in one of the three conditions: (1) a news story read by a target speaker (N condition), (2) two news stories read simultaneously but independently by the target and other speaker (i.e. distracter) of an incongruent sex (Si condition), and (3) the same as (2) but sex of the distracter being congruent (Sc condition). The duration of each condition was 20 s, and the stimuli were followed by a visual presentation of a word, for which the subjects were instructed to judge whether or not the word was present in the preceding story. This train of conditions was repeated six times, and the brain activities during the Si and Sc conditions were compared with that in the N condition. We found that (a) in both Si and Sc conditions, prominent activations were observed in bilateral superior and middle temporal gyri, (b) compared to the Si condition, the activations in the Sc condition were more widespread and observed also in left inferior and middle frontal gyri, and (c) among these regions, the activities in temporal areas were positively correlated with the performance of the word challenge. Collectively, these results suggest that bilateral temporal and left frontal lobes play a key role in selective listening encountered in daily life depending on the degree of attention. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 38th Annual Meeting of Society for Neuroscience | |||||
| 発表年月日 | ||||||
| 日付 | 2008-11-19 | |||||
| 日付タイプ | Issued | |||||
