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Inferior Frontal Regions Underlie the Perception of Phonetic Category Invariance
Open accessAbstract
The problem of mapping differing sensory stimuli onto a common category is fundamental to human cognition. Listeners perceive stable phonetic categories despite many sources of acoustic variability. What are the neural mechanisms that underlie this perceptual stability? In this functional magnetic resonance imaging study, a short-interval habituation paradigm was used to investigate neural sensitivity to acoustic changes within and between phonetic categories. A region in the left inferior frontal sulcus showed a pattern of activation consistent with phonetic invariance: insensitivity to acoustic changes within a phonetic category and sensitivity to changes between phonetic categories. Left superior temporal regions, in contrast, showed graded sensitivity to both within- and between-category changes. These results suggest that perceptual insensitivity to changes within a phonetic category may arise from decision-related mechanisms in the left prefrontal cortex and add to a growing body of literature suggesting that the inferior prefrontal cortex plays a domain-general role in computing category representations.
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“Less support was provided for the prior association of the left ventral anterior supramarginal gyrus with a phonological store because the fronto-parietal verbal short-term memory areas are also activated for unexpected auditory change during tasks that have minimal working memory demands (Myers et al., 2009; Zevin et al., 2010; Ravizza et al., 2011).”
From A review and synthesis of the first 20years of PET and fMRI studies of heard speech, spoken language and reading (2012) · cites this paper as Myers et al., 2009
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Metadata
- Authors
- Myers, E. B., Blumstein, S. E., Walsh, E., & Eliassen, J.
- Affiliations
- Brown University (US)
- University of Cincinnati (US)
- Venue
- Psychological Science
- Publisher
- SAGE Publications
- Published
- 2009-07
- Volume
- 20
- Issue
- 7
- Pages
- 895-903
- ISSN
- 0956-7976 (ISSN-L)
- 1467-9280
- PMC
- PMC2851201
- OpenAlex
- W2162796810
- Cited by
- 153
- References
- 38
- Citations by year
- 2026: 8 · 2025: 6 · 2024: 13 · 2023: 4 · 2022: 10 · 2021: 15 · 2020: 10 · 2019: 11 · 2018: 8 · 2017: 11 · 2016: 7 · 2015: 8 · 2014: 12 · 2013: 8 · 2012: 6
- FWCI
- 9.29
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Locations
- Psychological Science (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institute on Deafness and Other Communication Disorders (R01DC006220)
- Topics
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Phonetics and Phonology Research
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neurobiology of Language and Bilingualism
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neuroscience and Music Perception
- Keywords
- phonetic perception, inferior frontal sulcus, left prefrontal cortex, category representation, acoustic variability, superior temporal cortex, perceptual stability, decision-making
- MeSH terms
- Acoustic Stimulation, Adult, Analysis of Variance, Auditory Perception, Brain Mapping, Decision Making, Discrimination, Psychological, Female, Frontal Lobe, Habituation, Psychophysiologic, Humans, Magnetic Resonance Imaging, Male, Phonetics, Reaction Time, Students, Echo-Planar Imaging, Imaging, Three-Dimensional, Young Adult
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