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Home / search advanced search browse create account log in faqs about this service copyright contact login | create account deficits of knowledge versus executive control in semantic cognition: insights from cued naming jefferies, elizabeth, patterson, karalyn and ralph, matthew a. Lambon (2007) deficits of knowledge versus executive control in semantic cognition: insights from cued naming. Neuropsychologia. Pp. 649-658. Issn 0028-3932 full text available as: jefferiese1. Pdf (pdf jefferiese1. Pdf) 386kb published version: abstract deficits of semantic cognition in semantic dementia and in aphasia consequent on cva (stroke) are qualitatively different. Patients with semantic dementia are characterised by progressive degradation of central semantic representations, whereas multimodal semantic deficits in stroke aphasia reflect impairment of executive processes that help to direct and control semantic activation in a task-appropriate fashion [jefferies, e. viagra bayer gsk , & lambon ralph, m. A. viagra 20 mg lilly icos (2006). Semantic impairment in stroke aphasia vs. buy viagra cheap Semantic dementia: a case-series comparison. Brain 129, 2132-2147]. We explored interactions between these two aspects of semantic cognition by examining the effects of cumulative phonemic cueing on picture naming in case series of these two types of patient. The stroke aphasic patients with multimodal semantic deficits cued very readily and demonstrated near-perfect name retrieval when cumulative phonemic cues reached or exceeded the target name's uniqueness point. Therefore, knowledge of the picture names was largely intact for the aphasic patients, but they were unable to retrieve this information without cues that helped to direct activation towards the target response. Equivalent phonemic cues engendered significant but much more limited benefit to the semantic dementia patients: their naming was still severely impaired even when most of the word had been provided. In contrast to the pattern in the stroke aphasia group, successful cueing was mainly confined to the more familiar un-named pictures. We propose that this limited cueing effect in semantic dementia follows from the fact that concepts deteriorate in a graded fashion [rogers, t. T. no grapefruit juice viagra , lambon ralph, m. viagra coupon A. , garrard, p. , bozeat, s. , mcclelland, j. L. viagra cost , & hodges, j. R. , et al. (2004). The structure and deterioration of semantic memory: a neuropsychological and computational investigation. Psychological review 111, 205-235]. For partially degraded items, the residual conceptual knowledge may be insufficient to drive speech production to completion but these items might reach threshold when they are bolstered by cues. price of viagra 20 mg (c) 2007 elsevier ltd. All rights reserved. viagra online without prescription Item type: article copyright, publisher and additional information: â. cheap viagra Si lo desea también puede ponerse en contacto con nosotros vía telefónica al número de teléfono: 913.441.384

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