
Contents
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40.1 Overview 40.1 Overview
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40.2 Important Dementias Associated with Impaired Voice Processing 40.2 Important Dementias Associated with Impaired Voice Processing
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40.2.1 Alzheimer’s Disease 40.2.1 Alzheimer’s Disease
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40.2.2 Fronto-temporal Dementias 40.2.2 Fronto-temporal Dementias
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40.2.3 Parkinson’s Disease and Lewy Body Dementia 40.2.3 Parkinson’s Disease and Lewy Body Dementia
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40.2.4 Huntington’s Disease 40.2.4 Huntington’s Disease
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40.3 Challenges of Assessing Voice Processing in Dementia 40.3 Challenges of Assessing Voice Processing in Dementia
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40.4 Voice Perception and Recognition 40.4 Voice Perception and Recognition
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40.4.1 Early Encoding of Vocal Features 40.4.1 Early Encoding of Vocal Features
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40.4.2 Perception of Voice Identity 40.4.2 Perception of Voice Identity
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40.4.3 Recognition of Familiar Voices 40.4.3 Recognition of Familiar Voices
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40.4.4 Processing of Own Voice 40.4.4 Processing of Own Voice
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40.4.5 Processing of Voices Versus Other Sensory Objects 40.4.5 Processing of Voices Versus Other Sensory Objects
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40.5 Vocal Paralinguistic Information 40.5 Vocal Paralinguistic Information
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40.5.1 Non-verbal Vocal Emotion 40.5.1 Non-verbal Vocal Emotion
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40.5.2 Prosody 40.5.2 Prosody
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40.5.2.1 Emotional Prosody 40.5.2.1 Emotional Prosody
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40.5.2.2 Linguistic Prosody 40.5.2.2 Linguistic Prosody
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40.5.2.3 Output Prosody 40.5.2.3 Output Prosody
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40.5.3 Accents 40.5.3 Accents
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40.5.4 Sarcasm 40.5.4 Sarcasm
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40.6 Combining Voices with Vision 40.6 Combining Voices with Vision
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40.7 Hallucinations of Voices 40.7 Hallucinations of Voices
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40.8 Neuroanatomical Correlates of Voice Processing in Dementia 40.8 Neuroanatomical Correlates of Voice Processing in Dementia
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40.8.1 Voice-Identity Processing 40.8.1 Voice-Identity Processing
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40.8.2 Paralinguistic Information Processing 40.8.2 Paralinguistic Information Processing
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40.8.3 Vocal Hallucinations 40.8.3 Vocal Hallucinations
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40.9 Conclusions 40.9 Conclusions
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Acknowledgements Acknowledgements
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References References
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40 Voice Processing in Dementia
Get accessDementia Research Centre, UCL Institute of Neurology, University College London, UK
Dementia Research Centre, UCL Institute of Neurology, University College London, UK
Dementia Research Centre, University College London
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Published:04 October 2019
Cite
Abstract
This chapter summarizes the clinical features, cognitive mechanisms, and neuroanatomical substrates of voice-processing disorders associated with the major dementias. Although disturbances of voice processing are rarely the leading feature of these diseases, impaired perception or recognition of voice identity and non-verbal vocal signals contributes to daily-life disability in the dementias and constitutes a significant source of distress for patients and caregivers. The brain networks targeted in particular diseases provide a substrate for the characteristic clinico-anatomical phenotypes that define different dementias and, more particularly, for the development of voice-processing deficits, as the networks overlap closely those implicated in the processing of voices in the healthy brain. The chapter firstly reviews key clinical and neuroanatomical characteristics of common dementias that affect voice processing, and considers the challenges of assessing voice processing in these diseases. It then outlines a taxonomy of voice-processing symptoms and deficits in the dementias, related to the perception and recognition of voices as complex ‘auditory objects’ that signal speaker identity as well as much other paralinguistic information. The extent to which deficits may be selective for voice attributes versus other domains of non-verbal sound and person knowledge, and the demands of integrating vocal with other sensory information, are considered. The chapter surveys the neuroanatomical correlates of disordered voice processing in neurodegenerative syndromes, and concludes by proposing a framework for understanding voice processing in the dementias and by indicating directions for future work.
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