Stimulus Expectancy Modulates Inferior Frontal Gyrus and Premotor Cortex Activity in Auditory Perception
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| Title: | Stimulus Expectancy Modulates Inferior Frontal Gyrus and Premotor Cortex Activity in Auditory Perception |
|---|---|
| Language: | English |
| Authors: | Osnes, Berge, Hugdahl, Kenneth, Hjelmervik, Helene |
| Source: | Brain and Language. Apr 2012 121(1):65-69. |
| Availability: | Elsevier. 6277 Sea Harbor Drive, Orlando, FL 32887-4800. Tel: 877-839-7126; Tel: 407-345-4020; Fax: 407-363-1354; e-mail: usjcs@elsevier.com; Web site: http://www.elsevier.com |
| Peer Reviewed: | Y |
| Physical Description: | |
| Page Count: | 5 |
| Publication Date: | 2012 |
| Document Type: | Journal Articles Reports - Research |
| Descriptors: | Music, Auditory Perception, Speech Communication, Brain, Task Analysis, Auditory Stimuli, Listening Skills, Expectation, Investigations |
| DOI: | 10.1016/j.bandl.2012.02.002 |
| ISSN: | 0093-934X |
| Abstract: | In studies on auditory speech perception, participants are often asked to perform active tasks, e.g. decide whether the perceived sound is a speech sound or not. However, information about the stimulus, inherent in such tasks, may induce expectations that cause altered activations not only in the auditory cortex, but also in frontal areas such as inferior frontal gyrus (IFG) and motor cortices, even in the absence of an explicit task. To investigate this, we applied spectral mixes of a flute sound and either vowels or specific music instrument sounds (e.g. trumpet) in an fMRI study, in combination with three different instructions. The instructions either revealed no information about stimulus features, or explicit information about either the music instrument or the vowel features. The results demonstrated that, besides an involvement of posterior temporal areas, stimulus expectancy modulated in particular a network comprising IFG and premotor cortices during this passive listening task. (Contains 3 figures.) |
| Abstractor: | As Provided |
| Entry Date: | 2012 |
| Accession Number: | EJ959796 |
| Database: | ERIC |
| Abstract: | In studies on auditory speech perception, participants are often asked to perform active tasks, e.g. decide whether the perceived sound is a speech sound or not. However, information about the stimulus, inherent in such tasks, may induce expectations that cause altered activations not only in the auditory cortex, but also in frontal areas such as inferior frontal gyrus (IFG) and motor cortices, even in the absence of an explicit task. To investigate this, we applied spectral mixes of a flute sound and either vowels or specific music instrument sounds (e.g. trumpet) in an fMRI study, in combination with three different instructions. The instructions either revealed no information about stimulus features, or explicit information about either the music instrument or the vowel features. The results demonstrated that, besides an involvement of posterior temporal areas, stimulus expectancy modulated in particular a network comprising IFG and premotor cortices during this passive listening task. (Contains 3 figures.) |
|---|---|
| ISSN: | 0093-934X |
| DOI: | 10.1016/j.bandl.2012.02.002 |
