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Acalculia in Aphasia.

Rafael Gonzalez1, Macarena Rojas1, Mónica Rosselli2

  • 1Departamento de Neurología y Neurocirugía, Hospital Clínico de la Universidad de Chile, Santiago, Chile.

Archives of Clinical Neuropsychology : the Official Journal of the National Academy of Neuropsychologists
|September 26, 2020
PubMed
Summary
This summary is machine-generated.

Aphasic acalculia, a calculation deficit in aphasia patients, is linked to nonverbal abilities and written language skills. These findings suggest calculation is partly independent of verbal language processing.

Keywords:
AcalculiaAphasiaSpanishWestern Aphasia Battery

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Linguistics

Background:

  • Aphasia patients can exhibit aphasic acalculia, a specific form of calculation impairment.
  • Understanding the predictors of calculation skills in aphasia is crucial for targeted interventions.

Purpose of the Study:

  • To explore the relationship between calculation abilities and various linguistic and non-linguistic factors in individuals with aphasia.
  • To develop and test regression models predicting one- and two-digit calculation skills using verbal and nonverbal measures.

Main Methods:

  • 119 men and 81 women with aphasia (mean age 57.37 years) were assessed using Spanish versions of the Western Aphasia Battery (WAB) and Boston Diagnostic Aphasia Examination (BDAE).
  • Calculation abilities were evaluated using the WAB calculation subtest and a Written Calculation test.
  • Predictors included demographic data (age, sex, education), language subtests (reading, writing), and nonverbal tests (Block Design, Raven's Colored Progressive Matrices).

Main Results:

  • Calculation difficulties were most pronounced in Global and Mixed non-fluent aphasia subtypes.
  • Significant correlations were found between calculation subtests and age, education, and most WAB subtests.
  • Nonverbal abilities (Block Design, Raven's Matrices) and education significantly predicted WAB calculation scores, while writing ability predicted Written Calculation scores.

Conclusions:

  • Nonverbal cognitive abilities are significant predictors of calculation performance in aphasia.
  • Written language skills, specifically writing ability, are crucial for written calculation tasks.
  • Calculation skills in aphasia appear to be influenced by both nonverbal and written language-dependent processes, suggesting a degree of verbal language independence.