Myoclonic absence seizure
Myoclonic absence seizure is a type of generalized non-motor (absence) seizure characterized by an interruption of ongoing activities, a blank stare and rhythmic three-per-second myoclonic movements, causing ratcheting abduction of the upper limbs leading to progressive arm elevation, and associated with 3 Hz generalized spike-wave discharges on the electroencephalogram. Duration is typically 10-60 s. Whilst impairment of consciousness may not be obvious the ILAE classified this seizure as a generalized non-motor seizure in 2017.
What is Myoclonic absence seizure?
Myoclonic absence 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 absence seizure that is severe, persistent, or accompanied by other warning signs, contact a qualified healthcare provider.
Possible conditions associated with Myoclonic absence seizure
The following conditions have been associated with Myoclonic absence seizure. Only a health professional can determine the underlying cause.
Childhood absence epilepsy
Childhood absence epilepsy is a medical condition that may be associated with various symptoms and signs.
Developmental and epileptic encephalopathy with spike-wave activation in sleep
Developmental and epileptic encephalopathy with spike-wave activation in sleep is a medical condition that may be associ...
Karayol-Borroto-Haghshenas neurodevelopmental syndrome
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congenital disorder of glycosylation, type IIcc
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developmental and epileptic encephalopathy 6B
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Related symptoms
When to seek medical care
Seek urgent care if Myoclonic absence seizure is severe, sudden, or occurs with chest pain, difficulty breathing, confusion, severe weakness, or other serious symptoms.