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Clusters of Bell's palsy

T D Gonçalves-Coêlho1, C N Pinheiro, E V Ferraz

  • 1Federal University of Maranhão, Brasil.

Arquivos De Neuro-Psiquiatria
|June 18, 1998
PubMed
Summary

Bell

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Area of Science:

  • Neurology
  • Epidemiology

Background:

  • Bell's palsy, a common cause of idiopathic facial paralysis, affects approximately 75% of peripheral facial palsies.
  • Pathogenesis theories include vascular-ischemia, viral, and autoimmune factors.

Purpose of the Study:

  • To analyze demographic and seasonal patterns of Bell's palsy cases.
  • To investigate potential correlations with environmental factors.

Main Methods:

  • Retrospective review of 239 Bell's palsy cases from 1985-1995.
  • Data analysis based on age, gender, and seasonal distribution.

Main Results:

  • Predominance in females (70.71%) and the 31-60 age group (40.59%).
  • Significant seasonal clustering in winter (31.38%) and autumn (30.13%).

Conclusions:

  • Bell's palsy shows a predilection for females aged 41-60, particularly during colder months.
  • Temporal case clustering supports an infectious etiology, possibly linked to respiratory infections.