Increased Activation in Superior Temporal Gyri as a Function of Increment in Phonetic Features
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| Title: | Increased Activation in Superior Temporal Gyri as a Function of Increment in Phonetic Features |
|---|---|
| Language: | English |
| Authors: | Osnes, Berge, Hugdahl, Kenneth, Hjelmervik, Helene |
| Source: | Brain and Language. Feb 2011 116(2):97-101. |
| 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: | 2011 |
| Document Type: | Journal Articles Reports - Research |
| Descriptors: | Stimuli, Phonetics, Brain Hemisphere Functions, Cognitive Processes, Auditory Stimuli, Diagnostic Tests, Acoustics |
| DOI: | 10.1016/j.bandl.2010.10.001 |
| ISSN: | 0093-934X |
| Abstract: | A common assumption is that phonetic sounds initiate unique processing in the superior temporal gyri and sulci (STG/STS). The anatomical areas subserving these processes are also implicated in the processing of non-phonetic stimuli such as music instrument sounds. The differential processing of phonetic and non-phonetic sounds was investigated in this study by applying a "sound-morphing" paradigm, where the presence of phonetic features were parametrically varied, creating a step-wise transition from a non-phonetic sound into a phonetic sound. The stimuli were presented in an event-related fMRI design. The fMRI-BOLD data were analysed using parametric contrasts. The results showed a higher sensitivity for sounds containing phonetic features compared to non-phonetic sounds in the middle part of STG, and in the anterior part of the planum temporale (PT) bilaterally. Although the same areas were involved in the processing of non-phonetic sounds, a difference in activation was evident in the STG, with an increase in activation related to increment of phonetic features in the sounds. The results indicate a stimulus-driven, bottom-up process that utilizes general auditory resources in the secondary auditory cortex, depending on specific phonetic features in the sounds. (Contains 1 table and 3 figures.) |
| Abstractor: | As Provided |
| Entry Date: | 2011 |
| Accession Number: | EJ913163 |
| Database: | ERIC |
| Abstract: | A common assumption is that phonetic sounds initiate unique processing in the superior temporal gyri and sulci (STG/STS). The anatomical areas subserving these processes are also implicated in the processing of non-phonetic stimuli such as music instrument sounds. The differential processing of phonetic and non-phonetic sounds was investigated in this study by applying a "sound-morphing" paradigm, where the presence of phonetic features were parametrically varied, creating a step-wise transition from a non-phonetic sound into a phonetic sound. The stimuli were presented in an event-related fMRI design. The fMRI-BOLD data were analysed using parametric contrasts. The results showed a higher sensitivity for sounds containing phonetic features compared to non-phonetic sounds in the middle part of STG, and in the anterior part of the planum temporale (PT) bilaterally. Although the same areas were involved in the processing of non-phonetic sounds, a difference in activation was evident in the STG, with an increase in activation related to increment of phonetic features in the sounds. The results indicate a stimulus-driven, bottom-up process that utilizes general auditory resources in the secondary auditory cortex, depending on specific phonetic features in the sounds. (Contains 1 table and 3 figures.) |
|---|---|
| ISSN: | 0093-934X |
| DOI: | 10.1016/j.bandl.2010.10.001 |
