Background:Alzheimer's disease (AD) affects not only memory but also other cognitive functions, such as orientation, language, praxis, attention, visual perception, or executive function. Most studies on oral communication in AD focus on aphasia; however, speech and orofacial apraxias are also present in these patients. The aim of this study was to investigate the presence of speech and orofacial apraxias in patients with AD with the hypothesis that apraxia severity is strongly correlated with disease severity.Methods:Ninety participants in different stages of AD (mild, moderate, and severe) underwent the following assessments: Clinical Dementia Rating, Mini-Mental State Examination, Lawton Instrumental Activities of Daily Living, a specific speech and orofacial praxis assessment, and the oral agility subtest of the Boston diagnostic aphasia examination.Results:The mean age was 80.2±7.2 years and 73% were women. Patients with AD had significantly lower scores than normal controls for speech praxis (mean difference=−2.9, 95% confidence interval (CI)=−3.3 to −2.4) and orofacial praxis (mean difference=−4.9, 95% CI=−5.4 to −4.3). Dementia severity was significantly associated with orofacial apraxia severity (moderate AD: β=−19.63, p=0.011; and severe AD: β=−51.68, p < 0.001) and speech apraxia severity (moderate AD: β=7.07, p = 0.001; and severe AD: β= 8.16, p < 0.001).Conclusion:Speech and orofacial apraxias were evident in patients with AD and became more pronounced with disease progression.

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results suggest that the errors present in the speech of apraxic individuals can suffer the influence of language once the most frequent errors found in the present study were different from those described in the international literature.

RESUMO Objetivo comparar o desempenho de idosos saudáveis com alta escolaridade nas análises quantitativas e qualitativas do Teste de Fluência Verbal Semântica, nas categorias ”animais” e ”frutas”, comparar o desempenho de subgrupos de participantes (com escolaridade alta e muito alta) em ambas as categorias, assim como o desempenho entre homens e mulheres. Métodos participaram do estudo 31 idosos, (>60 anos), com oito anos ou mais de escolaridade, procedentes do Distrito Federal (DF-Brasil). Todos realizaram o teste de 60 segundos, nas duas categorias. Foram analisados: total de palavras, clustering, switching, intersecção, retorno, tempo de teste e erros, atendendo às variáveis demográficas, como gênero e escolaridade (escolaridade alta: oito a 16 anos de estudo; escolaridade muito alta: 17 a 25 anos de estudo). Resultados participantes com escolaridade muito alta obtiveram melhor desempenho em ambas as categorias, com maior número total de palavras evocadas na categoria “animais” e maior quantidade de switches (p<0,05) em “frutas”. Quanto ao gênero, os homens obtiveram melhor desempenho na categoria “animais”, com maior número total de palavras evocadas e nos diferentes blocos de tempo (p<0,05), e maior quantidade de clusters e interseções (p<0,001). Conclusão o desempenho de idosos saudáveis com alta escolaridade foi influenciado por variáveis demográficas como anos de estudo e gênero, sugerindo que a aplicação do Teste de Fluência Verbal Semântica deve considerar o impacto dessas variáveis e realizar uma interpretação cautelosa dos resultados.

The literature on apraxia of speech describes the types and characteristics of phonological errors in this disorder. In general, phonemes affected by errors are described, but the distinctive features involved have not yet been investigated.ObjectiveTo analyze the features involved in substitution errors produced by Brazilian-Portuguese speakers with apraxia of speech.Methods20 adults with apraxia of speech were assessed. Phonological analysis of the distinctive features involved in substitution type errors was carried out using the protocol for the evaluation of verbal and non-verbal apraxia.ResultsThe most affected features were: voiced, continuant, high, anterior, coronal, posterior. Moreover, the mean of the substitutions of marked to markedness features was statistically greater than the markedness to marked features.ConclusionsThis study contributes toward a better characterization of the phonological errors found in apraxia of speech, thereby helping to diagnose communication disorders and the selection criteria of phonemes for rehabilitation in these patients.