Progressive decline of numerical skills in Alzheimer-type dementia: A case study

Luisa Girelli, Claudio Luzzatti, Giorgio Annoni, Tomaso Vecchi

Research output: Contribution to journalArticlepeer-review


In the present study we report the progressive dissolution of numerical skills in EP, a former teacher of mathematics, suffering from an Alzheimer's- type dementia. The longitudinal examination revealed a pattern of decline different from previous reported cases. An initial impairment in arithmetical procedures was followed by an insidious decay in more basic numerical tasks with a selective preservation of arithmetical facts. The present investigation confirms the functional independence of facts and procedures within the calculation system. Moreover, these findings suggest that in the context of a general cognitive decline, specific numerical skills are more resistant to deterioration.

Original languageEnglish
Pages (from-to)132-136
Number of pages5
JournalBrain and Cognition
Issue number1
Publication statusPublished - Jun 1999

ASJC Scopus subject areas

  • Cognitive Neuroscience
  • Experimental and Cognitive Psychology
  • Neuropsychology and Physiological Psychology


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