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Related Experiment Videos

Postural disturbances in paroxysmal positional vertigo.

A Katsarkas1, R Kearney

  • 1Department of Otolaryngology, McGill University, Montreal, Quebec, Canada.

The American Journal of Otology
|November 1, 1990
PubMed
Summary
This summary is machine-generated.

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Paroxysmal positional vertigo increases anteroposterior postural sway, not mediolateral sway, immediately after a vertigo episode. This finding relates to posterior semicircular canal excitation and impacts balance control.

Area of Science:

  • Neurology
  • Vestibular System Function
  • Biomechanics

Background:

  • Paroxysmal positional vertigo (PPV) is a common vestibular disorder.
  • Nystagmus during PPV often indicates posterior semicircular canal involvement.
  • Assessing postural sway is crucial for understanding balance deficits.

Purpose of the Study:

  • To quantify changes in postural sway before and after paroxysmal positional vertigo episodes.
  • To investigate the effect of posterior semicircular canal excitation on sway patterns.
  • To differentiate between anteroposterior and mediolateral sway alterations.

Main Methods:

  • Postural sway was measured using a force plate in 14 PPV patients.
  • Center of force (CoF) projections (anteroposterior and mediolateral) were recorded for 20 seconds.

Related Experiment Videos

  • Sway was analyzed before and after provocative maneuvers inducing vertigo and nystagmus.

    • Main Results:

    • In patients with vertigo (N=10), anteroposterior sway significantly increased post-maneuver (p<0.01).
    • Mediolateral sway showed no significant change following the provocative maneuver.
    • Nystagmus consistent with posterior semicircular canal excitation was observed in affected patients.

    Conclusions:

    • Posterior semicircular canal excitation in PPV leads to increased anteroposterior sway.
    • The findings suggest a directional imbalance in postural control following vertigo episodes.
    • This highlights the specific impact of PPV on balance, particularly in the anteroposterior plane.