Myoclonic seizure
A myoclonic seizure is a type of motor seizure characterized by sudden, brief (<100 ms) involuntary single or multiple contraction of muscles or muscle groups of variable topography (axial, proximal limb, distal). Myoclonus is less regularly repetitive and less sustained than is clonus.
What is Myoclonic seizure?
Myoclonic seizure is a symptom that people may experience for many reasons. It can be related to infections, chronic conditions, injuries, medication effects, or other health changes. The presence of this symptom alone does not diagnose any condition.
If you have Myoclonic seizure that is severe, persistent, or accompanied by other warning signs, contact a qualified healthcare provider.
Possible conditions associated with Myoclonic seizure
The following conditions have been associated with Myoclonic seizure. Only a health professional can determine the underlying cause.
CDKL5-deficiency disorder
CDKL5-deficiency disorder is a medical condition that may be associated with various symptoms and signs.
Developmental and epileptic encephalopathy 122
Developmental and epileptic encephalopathy 122 is a medical condition that may be associated with various symptoms and s...
Dursun-Ozgul neurodevelopmental syndrome
Dursun-Ozgul neurodevelopmental syndrome is a medical condition that may be associated with various symptoms and signs.
Epilepsy of infancy with migrating focal seizures
Epilepsy of infancy with migrating focal seizures is a medical condition that may be associated with various symptoms an...
Houge-Janssens syndrome 4
Houge-Janssens syndrome 4 is a medical condition that may be associated with various symptoms and signs.
Jeffries-Lakhani neurodevelopmental syndrome
Jeffries-Lakhani neurodevelopmental syndrome is a medical condition that may be associated with various symptoms and sig...
Juvenile absence epilepsy
Juvenile absence epilepsy is a medical condition that may be associated with various symptoms and signs.
Karayol-Borroto-Haghshenas neurodevelopmental syndrome
Karayol-Borroto-Haghshenas neurodevelopmental syndrome is a medical condition that may be associated with various sympto...
New-onset refractory status epilepticus
New-onset refractory status epilepticus is a medical condition that may be associated with various symptoms and signs.
Sandhoff disease
A lysosomal disorder from the GM2 gangliosidosis family, caused by biallelic pathogenic variants in the HEXB gene, chara...
Stolerman neurodevelopmental syndrome
Stolerman neurodevelopmental syndrome is a medical condition that may be associated with various symptoms and signs.
developmental and epileptic encephalopathy 100
developmental and epileptic encephalopathy 100 is a medical condition that may be associated with various symptoms and s...
Related symptoms
When to seek medical care
Seek urgent care if Myoclonic seizure is severe, sudden, or occurs with chest pain, difficulty breathing, confusion, severe weakness, or other serious symptoms.