Ever decreasing circles: Speech production in semantic dementia.
We explored the impact of a degraded semantic system on lexical, morphological and syntactic complexity in language production. We analysed transcripts from connected speech samples from eight patients with semantic dementia (SD) and eight age-matched healthy speakers. The frequency distributions of...
| Publicado en: | Cortex: A Journal Devoted to the Study of the Nervous System & Behavior Vol. 55; pp. 17 - 30 |
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| Autores principales: | , , |
| Formato: | research Journal Article |
| Publicado: |
Masson SPA
2014 Jun
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=107794418&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 107794418 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 00109452 GMP jtl: Cortex: A Journal Devoted to the Study of the Nervous System & Behavior issn: 00109452 maglogo: N pubinfo: dt: 2014 Jun vid: 55 pid: 12473 pub: Masson SPA artinfo: ui: 107794418 107794418 2012598030 10.1016/j.cortex.2013.02.013 NLM23561299 107794418 ppf: 17 ppct: 13 formats: tig: atl: Ever decreasing circles: Speech production in semantic dementia. aug: au: Meteyard, Lotte Quain, Emma Patterson, Karalyn affil: School of Psychology and Clinical Language Sciences, University of Reading, Reading, UK. Electronic address: l.meteyard@reading.ac.uk. sug: subj: Frontotemporal Dementia Physiopathology Speech Disorders Physiopathology Speech Production Measurement Aged Anomia Etiology Anomia Physiopathology Case Control Studies Frontotemporal Dementia Complications Human Middle Age Speech Disorders Etiology Aged: 65+ years Middle Aged: 45-64 years ab: We explored the impact of a degraded semantic system on lexical, morphological and syntactic complexity in language production. We analysed transcripts from connected speech samples from eight patients with semantic dementia (SD) and eight age-matched healthy speakers. The frequency distributions of nouns and verbs were compared for hand-scored data and data extracted using text-analysis software. Lexical measures showed the predicted pattern for nouns and verbs in hand-scored data, and for nouns in software-extracted data, with fewer low frequency items in the speech of the patients relative to controls. The distribution of complex morpho-syntactic forms for the SD group showed a reduced range, with fewer constructions that required multiple auxiliaries and inflections. Finally, the distribution of syntactic constructions also differed between groups, with a pattern that reflects the patients' characteristic anomia and constraints on morpho-syntactic complexity. The data are in line with previous findings of an absence of gross syntactic errors or violations in SD speech. Alterations in the distributions of morphology and syntax, however, support constraint satisfaction models of speech production in which there is no hard boundary between lexical retrieval and grammatical encoding. pubtype: Academic Journal doctype: research Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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