Knowledge of semantic features in mild cognitive impairment

Taler, Vanessa; Voronchikhina, Anna; Gorfine, Gillian; Lukasik, Matthew

doi:10.1016/j.jneuroling.2015.11.002

Cited by 15 publications

(11 citation statements)

References 34 publications

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“…The effect was found to be greater with worsening anomia. Taler et al (2016) similarly report greater impairment on biological items than artifacts in people with MCI on a semantic feature task.…”

Section: Introductionmentioning

confidence: 85%

“…Stimuli did not overlap between the two subtasks, and were matched for length and frequency across category and task using norms (HAL frequency) from the English Lexicon Project. (For further details on design and administration of Tasks 3a and 3b, see Taler et al, 2016. ) Task 4: Semantic Feature Questions…”

Section: Task 3: Common Feature Identificationmentioning

confidence: 99%

“…Several studies have demonstrated that significant declines in semantic memory are consistent and common in MCI and early stages of Alzheimer's disease (AD) (Ahmed et al, 2008;Barbeau et al, 2012;Salmon, 2012). Semantic memory is stable in healthy older adults (OAs) but shows a similar pattern of decline in people with amnestic MCI and AD (Adlam et al, 2006;Joubert et al, 2010;Taler et al, 2016). This pattern of decline is possibly due to degradation of semantic representations, as well as selective deficits in the selection, manipulation, and retrieval of semantic information (Joubert et al, 2010;Taler et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

“…Semantic memory is stable in healthy older adults (OAs) but shows a similar pattern of decline in people with amnestic MCI and AD (Adlam et al, 2006;Joubert et al, 2010;Taler et al, 2016). This pattern of decline is possibly due to degradation of semantic representations, as well as selective deficits in the selection, manipulation, and retrieval of semantic information (Joubert et al, 2010;Taler et al, 2016). However, while the semantic deficit in MCI is wellestablished (for a review, see Taler and Phillips, 2008), the exact nature of the impairment remains unclear (Adlam et al, 2006), and performance is affected by the tasks used for assessment (Brandt and Manning, 2009).…”

Section: Introductionmentioning

confidence: 99%

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Semantic Function in Mild Cognitive Impairment

et al. 2020

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It is well-established that semantic deficits are observed in mild cognitive impairment (MCI). However, the extent of impairment in different aspects of semantic function remains unclear, and may be influenced by the tasks used to assess performance. In the present study, people with MCI and cognitively healthy older adults completed a series of tasks assessing lexical access, retrieval, and recognition of semantic information, using different input and output modalities. Control participants outperformed people with MCI in almost all tasks, with the greatest deficits observed in picture naming tasks. This finding is interpreted as reflecting greater deficits in lexical access and/or access to the phonological and orthographic lexicon, and less severe deficits in retrieval and recognition of semantic feature and associative knowledge. In a subset of tasks, relatively greater impairment was also observed in biological compared to man-made items. From a clinical perspective, these results suggest that, while it is preferable that a full semantic battery be included in neuropsychological assessment, in cases where shorter testing time is necessary, picture naming is the task most likely to reveal deficits in people with MCI.

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Section: Introductionmentioning

confidence: 85%

Section: Task 3: Common Feature Identificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Semantic Function in Mild Cognitive Impairment

et al. 2020

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“…Otro aspecto recientemente reportado en el estudio de población sana y clínica fue la incidencia del sexo en el procesamiento de categorías semánticas, siendo mayor la dificultad de los hombres en la denominación de dibujos de las categorías 'frutas' y 'verduras' y, en las mujeres, en las categorías 'animales' y 'objetos inanimados' (Moreno-Martínez, Quaranta & Gainotti, 2019). Por otra parte se ha sugerido que tanto las alteraciones del proceso como del contenido juegan un papel en la disminución de la memoria semántica en DCL (Kirchberg, Cohen, Adelsky, Buthorn, Gomar, Gordon, Koppel, Christen, Conejero-Goldberg, Davies & Goldberg, 2012;Grossman, Peelle, Smith, McMillan, Cook, Powers, Dreyfuss, Bonner, Richmond, Boller, Camp & Burkholder, 2013;Taler, Voronchikhina, Gorfine & Lukasik, 2016).…”

Section: Introductionunclassified

Relaciones semánticas en adultos mayores sanos, Deterioro Cognitivo Leve y Enfermedad de Alzheimer

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2020

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La disminución en el desempeño en tareas de memoria semántica observada en la Enfermedad de Alzheimer (EA) se vincula con la pérdida progresiva de los atributos que subyacen a la representación de la categoría. El trabajo examinó la afectación en tareas semánticas centradas en dos categorías de 'seres vivientes', dependiendo del tipo de relación semántica entre los nodos y del grado de deterioro asociado a la EA. Ciento ocho participantes voluntarios de la Ciudad Autónoma de Buenos Aires, Argentina (Edad M = 71 años, DE = 6; Escolaridad M =10 años, DE = 5) completaron una tarea de verificación de la veracidad de oraciones (verdadero-falso). La tarea evaluó tres tipos de relación semántica: taxonómica, parte-todo y evaluativa. La muestra se dividió en cuatro grupos, en función de su rendimiento cognitivo: controles (n = 27), deterioro cognitivo leve o DCL (n = 50), EA leve (n = 36) y EA moderada (n = 14). Los resultados mostraron desempeño disminuido en el procesamiento de las afirmaciones falsas y mayor afectación de la relación semántica parte-todo en los grupos con mayor severidad de la EA respecto del resto. Se observó, asimismo, una tendencia escalonada en el desempeño, con el grupo control mostrando el mejor desempeño, seguido por los grupos DCL y EA leve, seguidos por el grupo EA moderada, aunque no todos estos escalones alcanzaron diferencias significativas. Los resultados son interpretados a la luz del impacto que el curso de la EA tiene sobre las relaciones semánticas y el aprovechamiento de este conocimiento para el trabajo clínico.

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