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Processing speed versus working memory: contributions to an information-processing task in multiple sclerosis.

Helen M Genova1, Jeannie Lengenfelder, Nancy D Chiaravalloti

  • 1Neuropsychology and Neuroscience Laboratory, Kessler Foundation Research Center, West Orange, New Jersey, USA.

Applied Neuropsychology. Adult
|February 5, 2013
PubMed
Summary
This summary is machine-generated.

Processing speed, not working memory, significantly impacts information processing in multiple sclerosis (MS). This finding highlights the importance of targeting processing speed for cognitive rehabilitation in MS patients.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Clinical Neurology

Background:

  • Multiple sclerosis (MS) frequently causes cognitive deficits, particularly in information processing.
  • The specific roles of processing speed and working memory in these deficits remain unclear.

Purpose of the Study:

  • To determine the contribution of processing speed and working memory to performance on an information-processing task in individuals with MS.
  • To elucidate the primary cognitive factors underlying information-processing challenges in MS.

Main Methods:

  • Forty-nine individuals diagnosed with MS completed assessments of processing speed and working memory.
  • Participants also performed the Keeping Track Task (KTT), an information-processing measure.
  • Regression analyses were employed to analyze the relationships between cognitive abilities and KTT performance.

Main Results:

  • Processing speed abilities were found to explain the largest portion of the variance in KTT performance within the MS group.
  • Working memory abilities showed a less significant contribution compared to processing speed.

Conclusions:

  • Processing speed is a critical determinant of performance on the KTT in individuals with MS.
  • Findings suggest that cognitive rehabilitation strategies focusing on enhancing processing speed may be beneficial for improving information-processing deficits in MS.