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[A patient with focal dystonia induced by golf and presenting a decrease in activity of cerebral motor cortex on

Masahito Tanaka1, Yasumasa Ohyagi, Masakazu Kawajiri

  • 1Department of Neurology, Neurological Institute, Graduate School of Medical Sciences, Kyushu University.

Rinsho Shinkeigaku = Clinical Neurology
|May 26, 2005
PubMed
Summary

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This study describes a rare case of focal dystonia in a golfer

Area of Science:

  • Neuroscience
  • Movement Disorders
  • Sports Medicine

Background:

  • Focal dystonia is a neurological disorder characterized by involuntary muscle contractions.
  • Repetitive activities, such as golf, can sometimes trigger focal dystonia.
  • Distinguishing golf-induced focal dystonia from 'yips' is crucial for diagnosis and treatment.

Observation:

  • A 45-year-old male golf instructor developed left arm focal dystonia at age 37.
  • Symptoms included involuntary arm movement and simultaneous triceps/biceps contraction, persisting after cessation of golf.
  • Standard neuroimaging (MRI, PET, SPECT) showed no abnormalities, but motor evoked potentials (MEPs) were absent bilaterally.

Findings:

  • Functional MRI (fMRI) revealed decreased activation in the right primary motor, supplementary motor, and premotor areas during a left arm raising task.

Related Experiment Videos

  • This pattern contrasts with typical focal dystonia findings of overactivated motor-associated areas.
  • The observed MEP and fMRI findings suggest a potential overlap in mechanisms between this focal dystonia and idiopathic generalized dystonia.

    • Implications:

    • This case highlights a rare presentation of focal dystonia possibly linked to repetitive golf swings.
    • The unique neurophysiological findings challenge conventional understanding and may necessitate revised diagnostic or therapeutic approaches.
    • Further research into the neurobiological underpinnings of sports-induced focal dystonia is warranted.