The Role of Segmentation in Phonological Processing: An fMRI Investigation

Burton, Martha W.; Small, Steven L.; Blumstein, Sheila E.

doi:10.1162/089892900562309

Cited by 347 publications

(303 citation statements)

References 40 publications

Supporting

Mentioning

266

Contrasting

Unclassified

Order By: Relevance

“…The present study observed significant increases in left IFG activation when participants discriminated the initial consonant of a syllable pair, consistent with results from other studies finding activation in this region during speech discrimination, phoneme monitoring, and rhyme monitoring (Binder et al, 1997;Burton et al, 2000;Demonet et al, 1992;Zatorre et al, 1992). Nevertheless, the exact role that left IFG plays in these types of tasks remains controversial (Poeppel, 1996).…”

Section: Inferior Frontal Gyrussupporting

confidence: 90%

“…One possibility is that left IFG is involved in accessing higher-order phonological representations such as articulatory gestures and that superior temporal regions are responsible for accessing more basic characteristics of speech such as phonetic features. Burton et al (2000) tested this theory using an auditory speech discrimination task and fMRI. In one experiment, participants were asked to judge whether a pair of otherwise identical words had the same initial phoneme (e.g., tip-tip vs tip-dip); the second experiment was similar except that stimulus words differed in terms of several phonemes not involved in discrimination (tip-tomb vs tip-doom).…”

Section: Inferior Frontal Gyrusmentioning

confidence: 99%

See 1 more Smart Citation

Overlapping neural regions for processing rapid temporal cues in speech and nonspeech signals☆

Joanisse

Gati

2003

NeuroImage

View full text Add to dashboard Cite

Speech perception involves recovering the phonetic form of speech from a dynamic auditory signal containing both time-varying and steady-state cues. We examined the roles of inferior frontal and superior temporal cortex in processing these aspects of auditory speech and nonspeech signals. Event-related functional magnetic resonance imaging was used to record activation in superior temporal gyrus (STG) and inferior frontal gyrus (IFG) while participants discriminated pairs of either speech syllables or nonspeech tones. Speech stimuli differed in either the consonant or the vowel portion of the syllable, whereas the nonspeech signals consisted of sinewave tones differing along either a dynamic or a spectral dimension. Analyses failed to identify regions of activation that clearly contrasted the speech and nonspeech conditions. However, we did identify regions in the posterior portion of left and right STG and left IFG yielding greater activation for both speech and nonspeech conditions that involved rapid temporal discrimination, compared to speech and nonspeech conditions involving spectral discrimination. The results suggest that, when semantic and lexical factors are adequately ruled out, there is significant overlap in the brain regions involved in processing the rapid temporal characteristics of both speech and nonspeech signals.

show abstract

Section: Inferior Frontal Gyrussupporting

confidence: 90%

Section: Inferior Frontal Gyrusmentioning

confidence: 99%

Overlapping neural regions for processing rapid temporal cues in speech and nonspeech signals☆

Joanisse

Gati

2003

NeuroImage

View full text Add to dashboard Cite

show abstract

“…Thus, switching between the two conditions could have enhanced cognitive demands causing an increase of the frontal activation in both conditions. Enhanced activation of the left IFG with increasing computational demands in a phoneme monitoring task (Demonet, Price, Wise, & Frackowiak, 1994) and in a phonological discrimination task (Burton, Small, & Blumstein, 2000) was previously shown. Therefore, the left accentuated frontal activation pattern in prosodic speech might reflect the effort to discriminate phonological aspects in different auditory modes, as the main difference between normal and prosodic speech is speech intelligibility.…”

Section: Frontal Activationmentioning

confidence: 73%

On the lateralization of emotional prosody: An event-related functional MR investigation

et al. 2003

View full text Add to dashboard Cite

In order to investigate the lateralization of emotional speech we recorded the brain responses to three emotional intonations in two conditions, i.e., ''normal'' speech and ''prosodic'' speech (i.e., speech with no linguistic meaning, but retaining the Ôslow prosodic modulationsÕ of speech). Participants listened to semantically neutral sentences spoken with a positive, neutral, or negative intonation in both conditions and judged how positive, negative, or neutral the intonation was on a five-point scale. Core peri-sylvian language areas, as well as some frontal and subcortical areas were activated bilaterally in the normal speech condition. In contrast, a bilateral fronto-opercular region was active when participants listened to prosodic speech. Positive and negative intonations elicited a bilateral fronto-temporal and subcortical pattern in the normal speech condition, and more frontal activation in the prosodic speech condition. The current results call into question an exclusive right hemisphere lateralization of emotional prosody and expand patient data on the functional role of the basal ganglia during the perception of emotional prosody.

show abstract

“…Following 2 Burton et al (2000) observed a left inferotemporal activation (TC À58, À56, À8) when subjects performed same -different judgments on spoken syllables, but only when they had to extract the first phoneme of the syllable, not when they could base their decisions on the syllable as a whole. This region, which is ascribed to the inferior temporal gyrus, seems to be more lateral than the VWFA.…”

Section: Functional Specializationmentioning

confidence: 95%

Specialization within the ventral stream: the case for the visual word form area

2004

View full text Add to dashboard Cite

Is there specialization for visual word recognition within the visual ventral stream of literate human adults? We review the evidence for a specialized ''visual word form area'' and critically examine some of the arguments recently placed against this hypothesis. Three distinct forms of specialization must be distinguished: functional specialization, reproducible localization, and regional selectivity. Examination of the literature with this theoretical division in mind indicates that reading activates a precise subpart of the left ventral occipitotemporal sulcus, and that patients with pure alexia consistently exhibit lesions of this region (reproducible localization). Second, this region implements processes adequate for reading in a specific script, such as invariance across upper-and lower-case letters, and its lesion results in the selective loss of reading-specific processes (functional specialization). Third, the issue of regional selectivity, namely, the existence of putative cortical patches dedicated to letter and word recognition, cannot be resolved by positron emission tomography or lesion data, but requires high-resolution neuroimaging techniques. The available evidence from single-subject fMRI and intracranial recordings suggests that some cortical sites respond preferentially to letter strings than to other categories of visual stimuli such as faces or objects, though the preference is often relative rather than absolute. We conclude that learning to read results in the progressive development of an inferotemporal region increasingly responsive to visual words, which is aptly named the visual word form area (VWFA).

show abstract

The Role of Segmentation in Phonological Processing: An fMRI Investigation

Cited by 347 publications

References 40 publications

Overlapping neural regions for processing rapid temporal cues in speech and nonspeech signals☆

Overlapping neural regions for processing rapid temporal cues in speech and nonspeech signals☆

On the lateralization of emotional prosody: An event-related functional MR investigation

Specialization within the ventral stream: the case for the visual word form area

Contact Info

Product

Resources

About