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Living with Myoclonus, familial

A rare inherited movement condition with brief jerking movements in the face, arms, and legs, starting in adulthood.

Understanding Myoclonus, familial

Familial cortical myoclonus is a rare inherited movement condition with brief, jerky, involuntary movements that slowly get worse.

People have short jerks in the face, arms, and legs that can be set off by touch. Most people also have sudden falls without losing consciousness. Seizures and other nervous system problems are not part of it, except for mild coordination problems later on. GARD lists onset in adulthood.

Signs & symptoms

GARD doesn't list a symptom list, but the summary describes these features:

  • Brief, jerky movements in the face, arms, and legs
  • Jerks set off by touch
  • Sudden falls without losing consciousness
  • Mild coordination problems late in the condition

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include brain and nervous system specialists and genetic specialists.

  3. Consider genetic testing

    Changes in NOL3 are linked to this condition. Genetic testing and counseling can help confirm a diagnosis and explain what it means for your family.

Care & treatment

Care team
Brain and nervous system specialists (neurologists); Genetic specialists (geneticists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with rare disease patient organizations for support
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Should we have genetic testing for the NOL3 gene?
Which treatments can help with the jerks and falls?
How can I lower my chance of injury from falls?

Quick facts

Symptoms usually startAdult
InheritanceAutosomal Dominant
GenesNOL3

GARD lists changes in the NOL3 gene. The condition is autosomal dominant, which means one changed copy of the gene can be enough to cause it.

GeneticNeurological

Also known as: familial cortical myoclonus; familial myoclonus; myoclonus, familial cortical

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Myoclonus, familialGARD ID 17444 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

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  • Eligibility is confirmed by the study team

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