An event-related fMRI investigation of phonological-lexical competition

Prabhakaran, Ranjani; Blumstein, Sheila E.; Myers, Emily B.; Hutchison, Emmette

doi:10.1016/j.bandl.2004.06.099

Cited by 16 publications

(35 citation statements)

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“…This result is balanced in part by evidence that a number of regions outside of the pSTG/STS are also sensitive to these factors (c.f. Prabhakaran et al, 2006; Goldrick & Rapp, 2006; Graves et al, 2007) and directly modulate pSTG/STS activation during speech perception (Gow et al, 2008; Gow & Segawa, 2009). This raises the possibility that sensitivity to lexical properties is referred from other areas, and that the STG/STS acts as a sensory buffer where multiple information types converge to refine and perhaps normalize transient representations of wordform.…”

Section: Introductionmentioning

confidence: 99%

The cortical organization of lexical knowledge: A dual lexicon model of spoken language processing

2012

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Current accounts of spoken language assume the existence of a lexicon where wordforms are stored and interact during spoken language perception, understanding and production. Despite the theoretical importance of the wordform lexicon, the exact localization and function of the lexicon in the broader context of language use is not well understood. This review draws on evidence from aphasia, functional imaging, neuroanatomy, laboratory phonology and behavioral results to argue for the existence of parallel lexica that facilitate different processes in the dorsal and ventral speech pathways. The dorsal lexicon, localized in the inferior parietal region including the supramarginal gyrus, serves as an interface between phonetic and articulatory representations. The ventral lexicon, localized in the posterior superior temporal sulcus and middle temporal gyrus, serves as an interface between phonetic and semantic representations. In addition to their interface roles, the two lexica contribute to the robustness of speech processing.

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Section: Introductionmentioning

confidence: 99%

The cortical organization of lexical knowledge: A dual lexicon model of spoken language processing

2012

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“…Their productions were recorded and subsequently analyzed for VOT. Similar to Prabhakaran et al's (2006) study investigating auditory word recognition, Peramunage et al's (2011) results examining spoken word production showed modulation of activity as a function of lexical density in the supramarginal and left superior temporal gryi. A similar density effect emerged in the inferior frontal and precentral gyri as well.…”

Section: Segments Features and The Lexiconmentioning

confidence: 70%

“…Neither the Prabhakaran et al (2006) nor the Okada & Hickok studies (2006) showed a density effect for nonwords. These findings suggest that the locus of the neighborhood density effect was lexical, reflecting access to the lexicon, rather than prelexical, reflecting the phonotactic probabilities of possible words in the language.…”

Section: Segments Features and The Lexiconmentioning

confidence: 93%

“…In the first study (Prabhakaran et al, 2006), participants performed an auditory lexical decision task in which both word and nonword stimuli varied in neighborhood density. (A density neighborhood can be created for nonwords by determining the number of words that are created when substituting, adding, or deleting a segment to a nonword stimulus).…”

Section: Segments Features and The Lexiconmentioning

confidence: 99%

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Phonetic categories and phonological features: Evidence from the cognitive neuroscience of language

Blumstein¹,

Lahiri²,

Kotzor³

2017

The Speech Processing Lexicon

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Despite the central role that phonetic features and segments play in linguistic theory, there is debate about their status in language processing as well as the nature of their representations. In this chapter, we consider recent research examining evidence from the cognitive neuroscience of language that may not only inform but also help resolve this debate. Specifically, we investigate the neural systems underlying phonetic category and phonetic feature invariance, and the role of segments and features in lexical access. Results from a series of functional neuroimaging studies provide evidence that there is an invariant representation for phonetic categories as well as an invariant representation for more abstract phonetic features. The neural areas activated suggest that the source of phonetic category invariance reflects computations over phonetic category membership, and phonetic feature representations are acoustic in nature but are based on more abstract properties of speech rather than directly sensory processes. Additionally, lexical representations in both auditory word recognition and spoken word production include both segments and the features that underlie them.

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“…An EEG study shows effects of lexical information in the superior temporal gyrus (STG) and provides evidence that activity in STG is modulated through interactions with the supramarginal gyrus (SMG) (Gow et al, 2008), an area sensitive to the lexical status of an item (e. g., Prabhakaran et al, 2006). Together, the data support interactions between lexical and pre-lexical sources of information.…”

Section: Section I: Flexibility In Speech Perception: Integrating Meamentioning

confidence: 83%

Flexible and adaptive processes in speech perception

Guediche¹

2017

The Speech Processing Lexicon

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The perception of speech can be flexible, influenced by multiple sources of information, and plastic, tuned over time to cumulative experience. This chapter provides examples of cognitive neuroscience research, presented at a workshop on speech and lexical processing. Section I demonstrates effects of different sources of semantic information on perception and brain activity. Section II presents evidence for the role of internally generated linguistic predictions in guiding adaptive plasticity, and for the potential involvement of a cerebellar-mediated supervised learning mechanism. Finally, Section III examines the relationship between flexibility and adaptive plasticity and underscores the need for considering their underlying neurobiological mechanisms and their interactions with cognitive processes, and other factors that contribute to generalization in order to further elucidate this relationship.The perception of speech depends on mapping a highly variable and complex acoustic signal onto meaningful sounds and words. However, when the speech signal violates learned regularities due to natural, environmental, or synthetic distortions of the speech signal, accurate perception can be maintained through adjustments in mapping the acoustic signal onto more abstract linguistic information. Such adjustments are facilitated by disambiguating contexts that influence perception of the acoustic signal to be more consistent with the context. They can also accumulate, over brief periods of exposure, and affect perception of later instances of the distorted speech (adaptive plasticity). Current cognitive neuroscience research continues to investigate the underlying mechanisms and neural systems that support these flexible and adaptive properties of speech processing.The main goal of this chapter is to review findings presented at a workshop on speech and lexical processing, largely from our research group and collaborators, on studies investigating flexible and adaptive processes in speech perception. Section I of this chapter describes behavioral and functional neuroimaging results that provide evidence for interactions across multiple levels of language

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An event-related fMRI investigation of phonological-lexical competition

Cited by 16 publications

References 0 publications

The cortical organization of lexical knowledge: A dual lexicon model of spoken language processing

The cortical organization of lexical knowledge: A dual lexicon model of spoken language processing

Phonetic categories and phonological features: Evidence from the cognitive neuroscience of language

Flexible and adaptive processes in speech perception

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