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Related Experiment Videos

Postural stability in patients with Huntington's disease.

J Tian1, S J Herdman, D S Zee

  • 1Department of Neurology, Johns Hopkins Hospital, Baltimore, MD 21205.

Neurology
|June 1, 1992
PubMed
Summary

Huntington's disease (HD) patients exhibit impaired postural stability, particularly when relying on vestibular input alone. Their balance control is further compromised by delayed motor responses and increased sway, leading to falls.

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Area of Science:

  • Neuroscience
  • Human Physiology
  • Movement Disorders

Background:

  • Huntington's disease (HD) is a neurodegenerative disorder affecting motor control.
  • Postural stability is crucial for daily function and is maintained by integrating sensory information.
  • Sensory reweighting and automatic postural responses are key components of balance control.

Purpose of the Study:

  • To investigate postural stability in Huntington's disease (HD) patients.
  • To examine how HD patients utilize sensory cues (visual, proprioceptive, vestibular) for balance.
  • To assess automatic postural responses to external perturbations in HD.

Main Methods:

  • Characterized postural stability in HD patients and healthy controls.
  • Assessed reliance on proprioceptive, visual, and vestibular cues for balance.

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  • Recorded automatic postural responses to support surface translations and rotations.

    • Main Results:

    • HD patients showed normal reliance on proprioceptive cues but increased sway when proprioceptive or visual cues were altered.
    • HD patients demonstrated a deficit in using vestibular information for postural stability.
    • Compensatory motor responses in lower extremities were delayed by 30-60 ms in HD patients.
    • HD patients experienced more sway and falls during unexpected support surface rotations.

    Conclusions:

    • Huntington's disease impairs the ability to maintain postural stability, especially when relying on vestibular input.
    • Delayed automatic postural responses contribute to balance deficits in HD.
    • These findings highlight the complex sensory integration challenges faced by individuals with HD.