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Word finding difficulty as a post-polio sequelae.

R L Bruno1, J R Zimmerman

  • 1The Post-Polio Institute, Englewood Hospital and Medical Center, New Jersey 07631, USA.

American Journal of Physical Medicine & Rehabilitation
|July 13, 2000
PubMed
Summary
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Polio survivors experiencing word-finding difficulties may have decreased dopamine secretion, potentially linked to basal ganglia damage. This dopamine reduction may also contribute to fatigue and attention deficits in polio survivors.

Area of Science:

  • Neuroscience
  • Neurology
  • Clinical Psychology

Background:

  • Post-polio syndrome (PPS) affects a significant number of polio survivors, often leading to persistent neurological issues.
  • Word-finding difficulty, a common complaint in PPS, impacts daily communication and quality of life.
  • The underlying mechanisms of cognitive deficits in PPS, including word-finding issues, are not fully understood.

Purpose of the Study:

  • To objectively assess word-finding difficulty in polio survivors.
  • To investigate the relationship between word-finding difficulty, fatigue, and cognitive functions (attention, information processing speed).
  • To explore the role of brain dopamine secretion, using plasma prolactin as a marker, in these deficits.

Main Methods:

  • A cohort of 33 polio survivors completed validated questionnaires for fatigue and cognitive assessments (Animal Naming Test, FAS Test, attention, and processing speed tests).

Related Experiment Videos

  • Plasma prolactin levels were measured as a peripheral indicator of central dopamine activity.
  • Statistical analyses were used to correlate symptom severity, cognitive performance, and prolactin levels.

    • Main Results:

    • Polio survivors with severe fatigue and word-finding difficulty exhibited significantly lower scores on the Animal Naming Test.
    • Impaired performance on demanding attention and information processing speed tests was associated with poorer word-finding abilities.
    • A negative correlation was found between Animal Naming Test performance and plasma prolactin, suggesting reduced dopamine secretion impacts naming ability.

    Conclusions:

    • The findings support the hypothesis that decreased dopamine secretion contributes to word-finding difficulty in polio survivors.
    • This dopamine deficit may also be implicated in the fatigue and attention impairments observed in this population.
    • Damage to the basal ganglia by poliovirus is a potential cause for the observed dopamine reduction and associated symptoms.