{
  "abstract": "A-24-year-old woman presented with bilateral chin twitching that had started in infancy. She was otherwise well with no other neurological symptoms. The tremor was exacerbated by stressful situations and by exertion. Her mother and a cousin had experienced similar symptoms when younger, though her mother’s symptoms had resolved after age 50 years. Examination in the neurological clinic was normal, but a recent video ( figure 1, online supplemental video 1) allowed a diagnosis of hereditary geniospasm. Her symptoms disappeared following botulinum toxin injection (5×3 units Xeomin) into the mentalis.",
  "authors": [
    {
      "affiliations": [
        "Neurology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, England, UK"
      ],
      "name": "Saneeya Nasim"
    },
    {
      "affiliations": [
        "Private Clinic, Stratford-Upon-Avon, UK"
      ],
      "name": "Sarah Davies"
    },
    {
      "affiliations": [
        "Neurology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, England, UK",
        "University of Birmingham, Birmingham, UK"
      ],
      "name": "Benjamin R Wakerley"
    }
  ],
  "title": "Hereditary geniospasm (chin tremor)",
  "uid": "5dbb92d7-d400-564a-a031-b013d958a2aa"
}