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Static and dynamic balance function in spasmodic torticollis

M S Moreau1, A S Cauquil, M C Costes Salon

  • 1Service d'Exploration Fonctionnelle Sensorielle et Motrice, Toulouse, France.

Movement Disorders : Official Journal of the Movement Disorder Society
|January 26, 1999
PubMed
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Patients with spasmodic torticollis (ST) exhibit impaired dynamic balance, particularly in the lateral direction, suggesting reliance on vision for compensation. Botulinum toxin treatment improved head posture but not dynamic balance skills.

Area of Science:

  • Neurology
  • Biomechanics
  • Physical Therapy

Background:

  • Idiopathic spasmodic torticollis (ST) is characterized by abnormal head posture.
  • Abnormal head posture may impact balance control.
  • Understanding balance deficits in ST is crucial for rehabilitation.

Purpose of the Study:

  • To investigate the effects of abnormal head posture in ST on static and dynamic balance.
  • To compare balance skills in ST patients with healthy controls.
  • To evaluate the impact of botulinum toxin treatment on balance in ST patients.

Main Methods:

  • Assessed static balance using a force platform (eyes open/closed).
  • Evaluated dynamic balance on a rocking platform, measuring body and head displacement.

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  • Compared 10 ST patients with 10 controls, repeating dynamic tests post-botulinum toxin treatment.

    • Main Results:

    • ST patients showed no difference in static balance compared to controls.
    • Dynamic balance parameters were significantly worse in ST patients than controls, especially laterally.
    • Eye closure exacerbated dynamic balance deficits more in ST patients, indicating visual compensation.
    • Botulinum toxin treatment improved head posture but did not significantly alter dynamic balance parameters.

    Conclusions:

    • Spasmodic torticollis significantly impairs dynamic balance, necessitating visual compensation.
    • Current botulinum toxin treatment protocols may not fully restore dynamic balance function.
    • Further research is needed to explore therapeutic strategies for dynamic balance deficits in ST.