A Common System for the Comprehension and Production of Narrative Speech

Awad, Malaka; Warren, Jane E.; Scott, Sophie K.; Turkheimer, Federico; Wise, Richard J. S.

doi:10.1523/jneurosci.5257-06.2007

Cited by 131 publications

(134 citation statements)

References 73 publications

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“…This contrast of propositional with nonpropositional speech demonstrated widely distributed medial and lateral activity, corresponding to the activity observed in our studies of narrative speech production using positron emission tomography (PET) (Blank et al, 2002;Awad et al, 2007). The lateral neocortical activity is described here and is illustrated in Figure 2.…”

Section: Speech Contrasted With Countsupporting

confidence: 71%

Perceptual Systems Controlling Speech Production

Dhanjal¹,

Handunnetthi²,

Patel³

et al. 2008

J. Neurosci.

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It is proposed that the acquisition and maintenance of fluent speech depend on the rapid temporal integration of motor feedforward and polysensory (auditory and somatosensory) feedback signals. In a functional magnetic resonance imaging study on 21 healthy righthanded, English-speaking volunteers, we investigated activity within these motor and sensory pathways and their integration during speech. Four motor conditions were studied: two speech conditions (propositional and nonpropositional speech) and two silent conditions requiring repetitive movement of the principal articulators (jaw and tongue movements). The scanning technique was adapted to minimize artifact associated with overt speech production. Our result indicates that this multimodal convergence occurs within the left and right supratemporal planes (STPs), with peaks of activity at their posteromedial extents, in regions classically considered as unimodal auditory association cortex. This cortical specialization contrasted sharply with the response of somatosensory association cortex (SII), in which activity was suppressed during speech but not during the silent repetitive movement of the principal articulators. It was also clearly distinct from the response of lateral auditory association cortex, which responded to auditory feedback alone, and from that within a left lateralized ventrolateral temporal and inferior frontal system, which served lexical-and sentence-level language retrieval. This response of cortical regions related to speech production is not predicted by the classical model of hierarchical cortical processing, providing new insights into the role of the STP in polysensory integration and into the modulation of activity in SII during normal speech production. These findings have novel implications for the acquisition and maintenance of fluent speech.

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Section: Speech Contrasted With Countsupporting

confidence: 71%

Perceptual Systems Controlling Speech Production

Dhanjal¹,

Handunnetthi²,

Patel³

et al. 2008

J. Neurosci.

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“…This is further complicated by the fact that few neurolinguistic studies measure production and comprehension of speech using the same speech materials (24,25). Seminal studies have attempted to map the extent of overlap between brain areas dedicated to the production and comprehension of speech (12,(26)(27)(28)(29)(30)(31)(32) and have identified intriguing spatial overlaps between the production and comprehension systems in left inferior frontal gyrus (IFG), left medial temporal gyrus (MTG), left superior temporal sulcus (STG), and left Sylvian fissure at the parietal-temporal boundary (SPt). These studies by and large implicate left hemisphere structures but provide an incomplete map of the overlap between the two systems, because it is unknown whether such overlap changes in the context of complex communication.…”

Section: Significancementioning

confidence: 99%

Coupled neural systems underlie the production and comprehension of naturalistic narrative speech

Silbert

Honey

Simony

et al. 2014

Proc. Natl. Acad. Sci. U.S.A.

321

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Neuroimaging studies of language have typically focused on either production or comprehension of single speech utterances such as syllables, words, or sentences. In this study we used a new approach to functional MRI acquisition and analysis to characterize the neural responses during production and comprehension of complex real-life speech. First, using a time-warp based intrasubject correlation method, we identified all areas that are reliably activated in the brains of speakers telling a 15-min-long narrative. Next, we identified areas that are reliably activated in the brains of listeners as they comprehended that same narrative. This allowed us to identify networks of brain regions specific to production and comprehension, as well as those that are shared between the two processes. The results indicate that production of a real-life narrative is not localized to the left hemisphere but recruits an extensive bilateral network, which overlaps extensively with the comprehension system. Moreover, by directly comparing the neural activity time courses during production and comprehension of the same narrative we were able to identify not only the spatial overlap of activity but also areas in which the neural activity is coupled across the speaker's and listener's brains during production and comprehension of the same narrative. We demonstrate widespread bilateral coupling between production-and comprehension-related processing within both linguistic and nonlinguistic areas, exposing the surprising extent of shared processes across the two systems.speech production | speech comprehension | intersubject correlation | brain-to-brain coupling S uccessful verbal communication requires the finely orchestrated interaction between production-based processes in the speaker's brain and comprehension-based processes in the listener's brain. The extent of brain areas involved in the production of real-world speech in a speaker's brain during naturalistic communication is largely unknown. As a result, the degree of overlap between the production and comprehension systems, and the ways in which they interact, remain controversial. This study pursues three aims: (i) to map all areas (including but not limited to sensory, motoric, linguistic, and extralinguistic) that are reliably activated during the production of complex, real-world narrative; (ii) to map the overlap between areas that respond reliably during the production and the comprehension of real-world narrative; and (iii) to assess the coupling between activity in the speaker's brain during naturalistic production and activity in the listener's brain during comprehension of the same narrative. We discuss each challenge in turn.The functional-anatomic architecture underlying the production of speech in an ecological context is incompletely characterized. Studies investigating production-based brain activity have been mainly restricted to the production of single phonemes (1-5), words (6-8), or short phrases in decontextualized, isolated environments (9-13) (see refs. 14...

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“…However, the almost complete separation between production and recognition research has precluded a direct empirical comparison of comprehension and production in psycholinguistic research (for a noteworthy exception, see a recent fMRI study revealing shared brain regions for processing meaning across modalities; Awad, Warren, Scott, Turkheimer, & Wise, 2007). In the present study, we therefore considered the joint effects of frequency, contextual constraint, and bilingualism on production (picture naming) and comprehension (reading and lexical decision), with the goal of distinguishing processes that are modality specific from those that are general to language processing.…”

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confidence: 99%