The impact of semantic impairment on word stem completion in Alzheimer's disease

Beauregard, Mario; Chertkow, Howard; Gold, David; Bergman, Simon

doi:10.1016/s0028-3932(00)00120-2

Cited by 13 publications

(7 citation statements)

References 60 publications

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“…Semantic deterioration in AD patients has been variously investigated with semantic prime methodology. The presence of a prime effect in mild to moderate AD patients that does not differ from that found in healthy elderly subjects has already been reported [14,15]. Also, lack of a WSC task priming in mild to moderate AD patients when compared with NC has already been reported [16,17].…”

Section: Discussionmentioning

confidence: 88%

“…Studying the semantic prime effect in two different groups of AD patients, divided according to the presence or absence of semantic category impairment, it has been shown [21] that the hyperpriming effect was related to a mild semantic deficit and to preserved knowledge of nested relationship between stimuli. Prime effect differences in AD patients for semantically disrupted versus non-disrupted words has been already reported, although in the absence of any difference between the AD patients and the NC group [15]. Giffard et al [21] maintained that in AD patients with semantic disturbances, the hierarchical structure of the semantic network might account for the hyperpriming phenomenon and for the prime effect.…”

Section: Discussionmentioning

confidence: 93%

“…Prime effect differences in AD patients for semantically disrupted versus non‐disrupted words has been already reported, although in the absence of any difference between the AD patients and the NC group [15]. Giffard et al.…”

Section: Discussionmentioning

confidence: 99%

“…Besides, most of the studies on WSC priming in AD patients used the response time as a measure of the prime effect and performed statistical analyses only on the correct response. To investigate semantic network break down with such a procedure might not be completely informative, considering that the semantic knowledge of different concepts may well deteriorate with different modalities and rates [15,20]. In other words, evaluating the prime effect on the basis of the response time might not disclose the presence of differences in loss of semantic information between different concepts.…”

Section: Discussionmentioning

confidence: 99%

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Word‐stem completion task to investigate semantic network in patients with Alzheimer's disease

Passafiume

Giacomo

Carolei

2006

Euro J of Neurology

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Semantic impairment in patients with Alzheimer's disease (AD) is revealed by tasks of verbal naming, verbal fluency, and semantic knowledge. Causes of the deficit remain unclear in spite of many studies to investigate whether AD patients suffer from the inability to have voluntary access to an almost intact semantic store or from its break down. Word-stem completion (WSC) tasks have been utilized in healthy subjects in order to study semantic memory and network by exploiting the possibility of the involuntary access to them. Available conflicting data refer to the presence of semantic prime in AD patients. To explore the semantic network in AD, patients were requested to complete with the first word that sprang to their mind a stem submitted immediately after presentation of the word prime, as a WSC task. Stems consisted of the three beginning letters of words that were semantically related to primes. We compared data obtained with this task from patients with mild to moderate AD with those from normal controls (NC). AD patients completed less stems (P<0.001) with the expected words than NC, suggesting a break down of the semantic network rather than a deficit in the access to the semantic store.

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Section: Discussionmentioning

confidence: 88%

Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Word‐stem completion task to investigate semantic network in patients with Alzheimer's disease

Passafiume

Giacomo

Carolei

2006

Euro J of Neurology

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“…Language disturbances in dementia have been historically attributed to the degradation of stored knowledge, whereas it is commonly assumed that language deficits in stroke aphasia reflect modality-specific impairment of access to intact conceptual knowledge (Adlam, Bozeat, Arnold, Watson, & Hodges, 2006; Beauregard, Chertkow, Gold, & Bergman, 2001; Rogers, Ivanoiu, Patterson, & Hodges, 2006; Salmon, Butters, & Chan, 1999). Although the storage-access dichotomy provides an intuitive framework, its assumptions have met with criticism (for discussion see Rapp & Caramazza, 1993).…”

Section: Introductionmentioning

confidence: 99%

Cognition, language, and clinical pathological features of non-Alzheimer's dementias: An overview

Reilly¹,

Rodriguez²,

Lamy³

et al. 2010

Journal of Communication Disorders

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There are many distinct forms of dementia whose pharmacological and behavioral management differ. Differential diagnosis among the dementia variants currently relies upon a weighted combination of genetic and protein biomarkers, neuroanatomical integrity, and behavior. Diagnostic specificity is complicated by a high degree of overlap in the initial presenting symptoms across dementia subtypes. For this reason, reliable markers are of considerable diagnostic value. Communication disorders have proven to be among the strongest predictors for discriminating among dementia subtypes. As such, Speech-Language Pathologists may be poised to make an increasingly visible contribution to dementia diagnosis and its ongoing management. The value and durability of this potential contribution, however, demands an improved disciplinewide knowledge base about the unique features associated with different dementia variants. To this end we provide an overview of cognition, language, and clinical pathological features of four of the most common non-Alzheimer's dementias: Frontotemporal Dementia, Vascular Dementia, Lewy Body Disease Dementia, and Parkinson's Disease Dementia.

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Current Awareness

2001

Int J Geriat Psychiatry

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In order to keep subscribers up‐to‐date with the latest developments in their field, John Wiley &: Sons are providing a current awareness service in each issue of the journal. The bibliography contains newly published material in the field of geriatric psychiatry. Each bibliography is divided into 9 sections: 1 Books, Reviews &: Symposia; 2 General; 3 Assessment; 4 Epidemiology; 5 Therapy; 6 Care; 7 Dementia; 8 Depression; 9 Psychology. Within each section, articles are listed in alphabetical order with respect to author. If, in the preceding period, no publications are located relevant to any one of these headings, that section will be omitted

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The impact of semantic impairment on word stem completion in Alzheimer's disease

Cited by 13 publications

References 60 publications

Word‐stem completion task to investigate semantic network in patients with Alzheimer's disease

Word‐stem completion task to investigate semantic network in patients with Alzheimer's disease

Cognition, language, and clinical pathological features of non-Alzheimer's dementias: An overview

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