Overview
Orphanet code 307067 refers to a rare genetic disease group where myoclonus — sudden, brief, involuntary muscle jerks — is a major defining feature. This category encompasses several rare conditions in which myoclonus significantly affects daily life and neurological function. Myoclonus can range from mild twitches to severe jerking movements that interfere with walking, eating, and other basic activities. These conditions are caused by changes (mutations) in specific genes that affect how the brain and nervous system control movement. Patients with these disorders may experience progressive worsening of myoclonus over time, sometimes accompanied by seizures (epilepsy), difficulty with coordination (ataxia), cognitive decline, or other neurological problems. The severity and combination of symptoms can vary widely depending on the specific underlying genetic cause. Treatment is mainly focused on managing symptoms. Anti-epileptic and anti-myoclonic medications such as valproate, clonazepam, levetiracetam, and piracetam may help reduce the frequency and severity of myoclonic jerks. Physical therapy and occupational therapy can also help maintain function. Currently, there is no cure for most genetic forms of myoclonus, but ongoing research continues to explore new treatment options. Early diagnosis through genetic testing is important for guiding treatment and providing families with accurate information about what to expect.
Key symptoms:
Sudden involuntary muscle jerks (myoclonus)Seizures or epilepsyDifficulty with balance and coordination (ataxia)TremorMuscle stiffness or rigidityDifficulty walkingSlurred speechCognitive decline or intellectual disabilityDifficulty with fine motor tasks like writingVision problemsSensitivity to light or flashing lights triggering jerksProgressive worsening of movement controlDifficulty swallowing
Variable
Can be inherited in different ways depending on the underlying gene
Variable
Can begin at different ages, from infancy through adulthood
Treatments
No FDA-approved treatments are currently listed for Rare genetic disease with myoclonus as a major feature.
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Specialists
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Treatment Centers
8 centersBaylor College of Medicine Rare Disease Center ↗
Baylor College of Medicine
📍 Houston, TX
🏥 NORDStanford Medicine Rare Disease Center ↗
Stanford Medicine
📍 Stanford, CA
🔬 UDNNIH Clinical Center Undiagnosed Diseases Program ↗
National Institutes of Health
📍 Bethesda, MD
🔬 UDNUCLA UDN Clinical Site ↗
UCLA Health
📍 Los Angeles, CA
🔬 UDNBaylor College of Medicine UDN Clinical Site ↗
Baylor College of Medicine
📍 Houston, TX
🔬 UDNHarvard/MGH UDN Clinical Site ↗
Massachusetts General Hospital
📍 Boston, MA
🏥 NORDMayo Clinic Center for Individualized Medicine ↗
Mayo Clinic
📍 Rochester, MN
👤 Mayo Clinic Center for Individualized Medicine
🏥 NORDUCLA Rare Disease Day Program ↗
UCLA Health
📍 Los Angeles, CA
Travel Grants
No travel grants are currently matched to Rare genetic disease with myoclonus as a major feature.
Community
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Caregiver Resources
NORD Caregiver Resources
Support, advocacy, and financial assistance for caregivers of rare disease patients.
Mental Health Support
Rare disease caregiving can be isolating. Connect with counseling and peer support.
Family & Caregiver Grants
Financial assistance programs specifically for caregivers of rare disease patients.
Social Security Disability
Learn how rare disease patients may qualify for SSDI/SSI benefits.
Questions for your doctor
Bring these to your next appointment
- Q1.What specific genetic subtype of myoclonus does my child or I have, and what does this mean for the future?,Which medications are best for controlling myoclonus, and what side effects should I watch for?,Are there any medications or substances I should avoid that could make the myoclonus worse?,How often should we have follow-up appointments and what tests will be needed over time?,Are there any clinical trials or new treatments being studied for this condition?,What therapies (physical, occupational, speech) would be most helpful right now?,Should other family members be tested for this genetic condition?
Common questions about Rare genetic disease with myoclonus as a major feature
What is Rare genetic disease with myoclonus as a major feature?
Orphanet code 307067 refers to a rare genetic disease group where myoclonus — sudden, brief, involuntary muscle jerks — is a major defining feature. This category encompasses several rare conditions in which myoclonus significantly affects daily life and neurological function. Myoclonus can range from mild twitches to severe jerking movements that interfere with walking, eating, and other basic activities. These conditions are caused by changes (mutations) in specific genes that affect how the brain and nervous system control movement. Patients with these disorders may experience progressive