Can Executive Cognitive Measures Differentiate Between Patients with Spinal- and Bulbar-Onset Amyotrophic Lateral Sclerosis?
Archives of Clinical Neuropsychology,  Clinical Article

Zalonis I et al. – Despite the fact that amyotrophic lateral sclerosis (ALS)–bulbar patients may present greater disease severity, specific executive impairments that are present early in the course of ALS seems to be independent of the site of onset.

  • Although executive functions in sporadic non-demented amyotrophic lateral sclerosis (ALS) patients are mostly affected, it remains unclear whether executive measures can differentiate between patients with bulbar and spinal ALS forms.
  • Thirty spinal and 18 bulbar-onset ALS patients (ALS-s and ALS-b, respectively) as well as 47 demographically related healthy controls were examined in executive processes (Trail Making Test-part B [TMT-(B-A)]; Stroop Neuropsychological Screening Test [SNST]; Similarities subtest of the Wechsler Adult Intelligence Scale [WAIS Similarities]; Wisconsin Card Sorting Test [WCST]).
  • ALS subgroups were similar with regard to demographic characteristics and disease duration; yet, ALS-b showed greater disease severity compared with ALS-s patients (p = .006).
  • Both ALS-s and ALS-b patients were significantly inferior to healthy controls on TMT-(B-A) (p < .001), SNST (p = .009 and p = .02, respectively) and WAIS Similarities (p = .031 and p = .021, respectively), whereas ALS-s performed significantly worse than controls on the WCST perseverative responses (p = .005).
  • However, neuropsychological measures did not significantly differ between ALS subgroups (p > .05).

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