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Comic Spin: A Comic Creation Tool Enabling Self-Expression for People with Aphasia
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“Just Not Together”: The Experience of Videoconferencing for People with Aphasia during the Covid-19 Pandemic
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Delivering group support for people with aphasia in a virtual world: experiences of service providers
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New Australian guidelines for the treatment of alcohol problems: an overview of recommendations
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Preliminary outcomes from a pilot study of personalised online supported conversation for participation intervention for people with Aphasia
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A Randomised Trial of Social Support Group Intervention for People with Aphasia: A Novel Application of Virtual Reality
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Empowering Expression for Users with Aphasia through Constrained Creativity
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Technology-Enhanced Reading Therapy for People With Aphasia: Findings From a Quasirandomized Waitlist Controlled Study.
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Co-Created Personas: Engaging and Empowering Users with Diverse Needs Within the Design Process
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Neural representation of vowel formants in tonotopic auditory cortex
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Abstract:
Speech sounds are encoded by distributed patterns of activity in bilateral superior temporal cortex. However, it is unclear whether speech sounds are topographically represented in cortex, or which acoustic or phonetic dimensions might be spatially mapped. Here, using functional MRI, we investigated the potential spatial representation of vowels, which are largely distinguished from one another by the frequencies of their first and second formants, i.e. peaks in their frequency spectra. This allowed us to generate clear hypotheses about the representation of specific vowels in tonotopic regions of auditory cortex. We scanned participants as they listened to multiple natural tokens of the vowels [ɑ] and [i], which we selected because their first and second formants overlap minimally. Formant-based regions of interest were defined for each vowel based on spectral analysis of the vowel stimuli and independently acquired tonotopic maps for each participant. We found that perception of [ɑ] and [i] yielded differential activation of tonotopic regions corresponding to formants of [ɑ] and [i], such that each vowel was associated with increased signal in tonotopic regions corresponding to its own formants. This pattern was observed in Heschl’s gyrus and the superior temporal gyrus, in both hemispheres, and for both the first and second formants. Using linear discriminant analysis of mean signal change in formant-based regions of interest, the identity of untrained vowels was predicted with ~73% accuracy. Our findings show that cortical encoding of vowels is scaffolded on tonotopy, a fundamental organizing principle of auditory cortex that is not language-specific.
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Keyword:
Psychological Sciences
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URL: https://doi.org/10.1016/j.neuroimage.2018.05.072 https://eprints.bbk.ac.uk/id/eprint/22721/1/WilsonEtAl2018-NeuroImage.pdf https://eprints.bbk.ac.uk/id/eprint/22721/
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Developing a tablet computer-based application ('App') to measure self-reported alcohol consumption in Indigenous Australians
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Technology Enhanced Writing Therapy for People with Aphasia: Results of a Quasi-Randomised Waitlist Controlled Study
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Social networking sites: barriers and facilitators to access for people with aphasia
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Receiving Aphasia Intervention in a Virtual Environment: The Participants’ Perspective
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Delivering word retrieval therapies for people with aphasia in a virtual communication environment
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