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Related Experiment Videos

Relation between cognitive dysfunction and pseudobulbar palsy in amyotrophic lateral sclerosis

S Abrahams1, L H Goldstein, A Al-Chalabi

  • 1Department of Psychology, Institute of Psychiatry, De Crespigny Park, London, UK.

Journal of Neurology, Neurosurgery, and Psychiatry
|May 1, 1997
PubMed
Summary

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Cognitive dysfunction, particularly executive function deficits, is common in amyotrophic lateral sclerosis (ALS). These impairments are more pronounced in ALS patients with pseudobulbar palsy, suggesting frontal lobe involvement.

Area of Science:

  • Neuroscience
  • Neurology
  • Cognitive Science

Background:

  • Amyotrophic lateral sclerosis (ALS) is a progressive neurodegenerative disease affecting motor neurons.
  • Cognitive dysfunction and pseudobulbar affect are increasingly recognized in ALS patients.
  • Understanding the relationship between cognitive deficits and specific ALS phenotypes is crucial for patient care.

Purpose of the Study:

  • To investigate the association between cognitive dysfunction and pseudobulbar features in patients diagnosed with ALS.
  • To compare cognitive performance in ALS patients with and without pseudobulbar palsy against healthy controls.

Main Methods:

  • A comprehensive neuropsychological battery was administered to three groups: ALS with pseudobulbar palsy (n=24), ALS without pseudobulbar palsy (n=28), and age-matched healthy controls (n=28).

Related Experiment Videos

  • Tests included assessments of executive function, memory, attention, and planning abilities, such as verbal fluency, Wisconsin card sorting test, and the Tower of Hanoi.

    • Main Results:

    • Both ALS groups exhibited executive function deficits, particularly in written verbal fluency, compared to controls.
    • Patients with pseudobulbar palsy showed additional impairments in non-verbal sequence generation and planning on complex tasks.
    • Deficits in executive functions, selective attention, and word recognition memory were observed across all ALS patients.

    Conclusions:

    • Cognitive impairments, primarily affecting executive processes and memory, are present in ALS patients.
    • The findings reinforce the link between ALS and frontal lobe dysfunction, which is more evident in those with pseudobulbar palsy.
    • Cognitive deficits indicating extramotor cortical involvement are not limited to the pseudobulbar palsy subgroup.