Confrontation naming impairment in dementia

Bayles, Kathryn A.; Tomoeda, Cheryl K.

doi:10.1016/0093-934x(83)90057-3

Cited by 368 publications

(167 citation statements)

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“…1.0). Results from this analysis suggest that the DAT group, as a whole, showed object naming deficits (F = 27.37, [1,18], P < 0.001). Within the DAT group there was no relationship between error frequency and ratings for concept familiarity (r = 0.12, p = 0.49), visual complexity (r = 0.05, p = 0.8), or word-frequency (r = -0.24, p = 0.16).…”

Section: Resultsmentioning

confidence: 94%

“…Anomia observed in DAT patients on tasks requiring visual object recognition has for some time been attributed to degradation of semantic representations. Explanation in terms of visuoperceptual impairments tend to be ruled out as the same patients compare favourably with matched controls on visuo-perceptual tests [3,5,6,35]; or that naming errors are deemed to be semantic associates with few, if any, explicable on the basis of perceptual misidentification [1,12,29,21,22].…”

Section: Introductionmentioning

confidence: 99%

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Loss of high-level perceptual knowledge of object structure in DAT

Done

Hajilou

2005

Neuropsychologia

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Visual object recognition and naming deficits in patients with dementia of the Alzheimer type (DAT) have typically been attributed to deficits in semantic processing. On a visual object naming test, a group of mild DAT patients were found to suffer from anomia, compared to an age-matched control group. DAT naming errors were typically within category (commission), associative or circumlocutory errors. Performance on tests of low level visuo-spatial ability fell within the normal range. Together these results suggested that anomia resulted from a dysfunctional semantic system with intact visual perception. However, in a naming task using visually degraded images of familiar objects, the recognition threshold in DAT patients was significantly higher, indicating the need for a more visually complete object representation, before it could be accurately recognised. In a matched task using words visually degraded in an identical manner, the recognition threshold for DAT patients was very similar to that of the control group. It is argued that these results support the idea that impaired structural descriptions of objects (i.e., pre-semantic representation of an object within the visual perceptual system) combines with degraded semantic representations to produce anomia in DAT.

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Section: Resultsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Loss of high-level perceptual knowledge of object structure in DAT

Done

Hajilou

2005

Neuropsychologia

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“…Impairment is indicated by problems in naming objects and pictures, in defining objects, and by poor comprehension of oral and written language. Deficiencies in semantic memory are often assessed by tests measuring confrontation naming, categorical verbal fluency or word to picture matching (Bayles and Tomoeda, 1983;Henry et al, 2004;Lonie et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

A longitudinal study of semantic memory impairment in patients with Alzheimer’s disease

Mårdh

Nägga

Samuelsson

2013

Cortex

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Introduction The present study explored the nature of the semantic deterioration normally displayed in the course of Alzheimer's disease. The aim was to disentangle the extent to which semantic memory problems in patients with Alzheimer's disease are best characterized as loss of semantic knowledge rather than difficulties in accessing semantic knowledge.Method A longitudinal approach was applied. The same semantic tests as well as same items were used across three test occasions a year apart. Twelve Alzheimer patients and 20 matched control subjects, out of a total of 25 cases in each group, remained at the final test occasion. Results and ConclusionsAlzheimer patients were impaired in all the semantic tasks as compared to the matched comparison group. A progressing deterioration was evident during the study period. Our findings suggest that semantic impairment is mainly due to loss of information rather than problems in accessing semantic information.

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“…En effet, dans l'évaluation du langage des patients Alzheimer, cette tâche est une des premières à être atteinte (Bayles & Tomoeda, 1983 ;Huff, 1988 ;Labarge et al, 1992 ;Barbarotto et al, 1998). Les troubles de la dénomination se manifestent le plus souvent par la production d'une autre dénomination ayant un lien sémantique avec la dénomination attendue (ex.…”

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