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Specific numerical processing impairment in ALS patients.

Arianna Palmieri1, Gianni Sorarù, Carla D'Ascenzo

  • 1Department of Philosophy, Sociology, Pedagogy and Applied Psychology, University of Padova, Padova, Italy. arianna.palmieri@unipd.it

Amyotrophic Lateral Sclerosis & Frontotemporal Degeneration
|September 8, 2012
PubMed
Summary

This study reveals specific multiplication deficits in amyotrophic lateral sclerosis (ALS) patients, unrelated to general cognitive decline. These findings highlight unique numerical processing impairments in ALS.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease primarily affecting motor neurons.
  • Cognitive impairment is increasingly recognized in ALS, but specific numerical processing deficits remain largely unexplored.
  • Understanding cognitive profiles in ALS is crucial for comprehensive patient care and management.

Purpose of the Study:

  • To investigate numerical processing abilities in patients with sporadic amyotrophic lateral sclerosis (ALS) for the first time.
  • To identify specific arithmetic deficits and their relationship to general cognitive functioning in ALS.
  • To explore potential underlying neural mechanisms associated with observed numerical impairments.

Main Methods:

  • Cognitive assessment of 24 non-demented ALS patients and 27 healthy controls.
  • Evaluation of numerical abilities including Number Comprehension, Transcoding, Arithmetic Fact retrieval, Calculation Skills, and Arithmetic Principles.
  • Neuropsychological functions assessed using Strong's consensus criteria.

Main Results:

  • Significant group differences were observed between ALS patients and controls in specific multiplication tasks: Multiplication Facts (Tables), Multiplication Approximation, and Multiplication Principles.
  • These arithmetic deficits were not statistically correlated with impairments in broader cognitive functions.
  • The findings suggest a specific pattern of numerical impairment rather than generalized cognitive decline.

Conclusions:

  • Specific, previously unreported arithmetical deficits, particularly in multiplication, are present in ALS patients.
  • This impairment pattern may indicate damage to cortico-subcortical circuits involved in specific aspects of multiplication.
  • The study contributes to a more detailed delineation of the cognitive impairment profile in amyotrophic lateral sclerosis.