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Related Experiment Videos

Postural control in Huntington's disease (HD).

J R Tian1, S J Herdman, D S Zee

  • 1Department of Neurology, Johns Hopkins University, School of Medicine, Baltimore, MD.

Acta Oto-Laryngologica. Supplementum
|January 1, 1991
PubMed
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Patients with Huntington's Disease (HD) exhibit significant postural instability, particularly when relying on vestibular input for balance. Their abnormal responses to platform perturbations suggest basal ganglia involvement in maintaining upright posture.

Area of Science:

  • Neuroscience
  • Biomechanics
  • Human Physiology

Background:

  • Huntington's Disease (HD) is a neurodegenerative disorder affecting motor control.
  • Postural control is essential for maintaining balance and preventing falls.
  • The basal ganglia play a crucial role in motor regulation, including posture.

Purpose of the Study:

  • To investigate postural control deficits in patients with Huntington's Disease (HD).
  • To determine the specific sensory systems (visual, proprioceptive, vestibular) affected in HD patients' postural control.
  • To elucidate the role of the basal ganglia in postural stability.

Main Methods:

  • Quantitative moving-platform posturography was employed.
  • Twenty patients with HD and 20 age-matched healthy controls participated.

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  • Sensory cues were manipulated (visual elimination, proprioceptive attenuation) to isolate vestibular function.

    • Main Results:

    • HD patients demonstrated significantly increased anterior-posterior sway compared to controls.
    • Postural sway was exacerbated in HD patients when relying on vestibular cues.
    • HD patients exhibited increased response latencies to translational platform perturbations.
    • Abnormal amplitude responses to rotational perturbations were observed in HD patients.

    Conclusions:

    • Patients with Huntington's Disease exhibit a consistent pattern of postural control abnormalities.
    • These findings suggest a significant role for the basal ganglia in various aspects of postural regulation.
    • Posturography is a valuable tool for assessing neurological disorders affecting balance.