Cortical speech processing mechanisms while vocalizing visually presented languages
Abstract
To elucidate cortical processing during vocalization, we used positron emission tomography to measure regional cerebral blood flow during vocalization in six Japanese subjects. During reading Japanese sentences used daily or short syllables aloud, the visual cortices, the left Heschl's gyrus, Broca's area, the primary motor area of the articulatory organs, the supplementary motor area and the cerebellum were significantly activated, compared with resting conditions. The superior temporal gyri were rarely activated. Significant activation of the cerebellum was observed by comparing cortical activity during reading sentences used daily with that during reading meaningless short syllables. These results suggest that vocalization of familiar materials is taken over by the cerebellum, rather than cortical speech areas, and without engagement of the superior temporal gyri.
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There is a striking overlap between areas activated during articulation of speech, vocalisation, and control of volitional breathing in the absence of vocalisation.
“There was, nevertheless, a striking overlap between the areas activated during the articulation of speech, vocalisation (Hirano et al., 1996) and the control of volitional breathing in the absence of vocalisation (Ramsay et al., 1993; Fink et al., 1996).”
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 Hirano et al., 1996
Superior temporal activation during self-vocalisation is less than that expected when perceiving another's voice.
“(a) superior temporal activation during self-vocalisation was less than that expected when perceiving another's voice (Hirano et al., 1996)”
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 Hirano et al., 1996
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- Authors
- Hirano, S., Kojima, H., Naito, Y., Honjo, I., Kamoto, Y., Okazawa, H., Ishizu, K., Yonekura, Y., Nagahama, Y., Fukuyama, H., & Konishi, J.
- Affiliations
- Kyoto University (JP)
- ORCID
- Venue
- Neuroreport
- Published
- 1996-12
- Volume
- 8
- Issue
- 1
- Pages
- 363-367
- ISSN
- 0959-4965 (ISSN-L)
- OpenAlex
- W2026795596
- Cited by
- 57
- References
- 3
- Citations by year
- 2025: 1 · 2020: 1 · 2019: 2 · 2016: 1 · 2015: 5 · 2014: 2 · 2013: 1 · 2012: 6
- FWCI
- 0.71
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Neuroreport (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neurobiology of Language and Bilingualism
- Social Sciences › Psychology › Experimental and Cognitive Psychology › Phonetics and Phonology Research
- Life Sciences › Neuroscience › Cognitive Neuroscience › Tactile and Sensory Interactions
- Keywords
- vocalizations, regional cerebral blood flow, cerebellum, Broca's area, supplementary motor area, primary motor cortex, Heschl's gyrus, superior temporal gyrus, Japanese language
- MeSH terms
- Adult, Cerebellum, Cerebral Cortex, Cerebrovascular Circulation, Frontal Lobe, Humans, Male, Reading, Speech, Tomography, Emission-Computed, Visual Cortex
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