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characterising_speech_patterns_in_frontotemporal_dementia_and_alzheimer_s_disease_according_to_the_levelt-model [2014/03/15 12:30] (current)
bziolko created
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 +Manuela.Bung and Anna Barney
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 +**CHARACTERISING SPEECH PATTERNS IN FRONTOTEMPORAL DEMENTIA AND ALZHEIMER’S DISEASE ACCORDING TO THE LEVELT-MODEL**
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 +Communication and understanding of words require a range of resources such as lexical, semantic and perceptual processing. The organization and interactions during conversation depend on the ability to plan and to exchange information. 
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 +The theory of speech production described by Levelt [e.g. Cognition, 14, 41-104, 1983] tries to explain how speech is processed: from the conceptualisation up to the articulation of an utterance. It is an organised model in which the individual components work mostly independent from each other the output of one module generates the input for the next one.
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 +The required executive functions for speech processing, such as structuring and organizing, may be impaired when brain networks are disrupted. Language processing is particularly disturbed when temporal and frontal cortical areas are affected. The subsequent abnormal breakdown in fluent speech can be observed in frontotemporal dementia (semantic dementia, progressive non-fluent aphasia and behavioural-variant frontotemporal dementia) or Alzheimer's disease, in which brain atrophy in frontal and/or temporal area(s) is common. 
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 +Some of these dementia groups show common speech and language impairments but there are significant differences as well. By using a speech production model we aim to use speech errors to locate the disruption in the speech production process for different pathologies within the different levels of the Levelt-model.
  
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