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.
Conditions associated with myoclonic seizure
The following conditions have been associated with myoclonic seizure in medical literature. This is informational and not a diagnosis.
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 symp...
Dursun-Ozgul neurodevelopmental syndrome
Dursun-Ozgul neurodevelopmental syndrome is a medical condition that may be associated with various symptoms a...
Epilepsy of infancy with migrating focal seizures
Epilepsy of infancy with migrating focal seizures is a medical condition that may be associated with various s...
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 sympto...
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 vari...
New-onset refractory status epilepticus
New-onset refractory status epilepticus is a medical condition that may be associated with various symptoms an...
Sandhoff disease
A lysosomal disorder from the GM2 gangliosidosis family, caused by biallelic pathogenic variants in the HEXB g...
Stolerman neurodevelopmental syndrome
Stolerman neurodevelopmental syndrome is a medical condition that may be associated with various symptoms and ...
developmental and epileptic encephalopathy 100
developmental and epileptic encephalopathy 100 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy 103
developmental and epileptic encephalopathy 103 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy 108
developmental and epileptic encephalopathy 108 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy 109
developmental and epileptic encephalopathy 109 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy 112
developmental and epileptic encephalopathy 112 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy 114
developmental and epileptic encephalopathy 114 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy 116
developmental and epileptic encephalopathy 116 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy 118
developmental and epileptic encephalopathy 118 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy 119
A developmental and epileptic encephalopathy caused by the variants in the RNU2-2 gene, in which most reported...
developmental and epileptic encephalopathy 120
developmental and epileptic encephalopathy 120 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy 6B
developmental and epileptic encephalopathy 6B is a medical condition that may be associated with various sympt...
developmental and epileptic encephalopathy 91
developmental and epileptic encephalopathy 91 is a medical condition that may be associated with various sympt...
developmental and epileptic encephalopathy, 19
Any early infantile epileptic encephalopathy in which the cause of the disease is a mutation in the GABRA1 gen...
developmental and epileptic encephalopathy, 24
Any early infantile epileptic encephalopathy in which the cause of the disease is a mutation in the HCN1 gene....
developmental and epileptic encephalopathy, 31A
Any developmental and epileptic encephalopathy in which the cause of the disease is a heterozygous mutation in...
developmental and epileptic encephalopathy, 51
Any early infantile epileptic encephalopathy in which the cause of the disease is a mutation in the MDH2 gene....
developmental and epileptic encephalopathy, 56
developmental and epileptic encephalopathy, 56 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy, 63
developmental and epileptic encephalopathy, 63 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy, 66
developmental and epileptic encephalopathy, 66 is a medical condition that may be associated with various symp...
developmental and epileptic encephalopathy, 6A
Any early infantile epileptic encephalopathy in which the cause of the disease is a mutation in the SCN1A gene...
developmental and epileptic encephalopathy, 74
developmental and epileptic encephalopathy, 74 is a medical condition that may be associated with various symp...
developmental delay with or without epilepsy
developmental delay with or without epilepsy is a medical condition that may be associated with various sympto...
epilepsy, early-onset, 3, with or without developmental delay
epilepsy, early-onset, 3, with or without developmental delay is a medical condition that may be associated wi...
hyperphosphatasia with intellectual disability syndrome 3
Any hyperphosphatasia-intellectual disability syndrome in which the cause of the disease is a mutation in the ...
intellectual disability, autosomal dominant 42
Any autosomal dominant intellectual disability in which the cause of the disease is a heterozygous mutation in...
intellectual disability, autosomal dominant 43
Any autosomal dominant non-syndromic intellectual disability in which the cause of the disease is a mutation i...
intellectual disability, autosomal dominant 55, with seizures
intellectual disability, autosomal dominant 55, with seizures is a medical condition that may be associated wi...
lissencephaly 10
lissencephaly 10 is a medical condition that may be associated with various symptoms and signs....
microcephaly, epilepsy, and diabetes syndrome 1
microcephaly, epilepsy, and diabetes syndrome 1 is a medical condition that may be associated with various sym...
Tests providers may use to investigate myoclonic seizure
When investigating myoclonic seizure, a healthcare provider may order one or more of the following laboratory tests. Test selection is a clinical decision made by a qualified professional.
CBC with Differential
Measures red blood cells, white blood cells, and platelets to help evaluate overall health and detect disorder...
Comprehensive Metabolic Panel (CMP)
Measures 14 substances in the blood to assess kidney and liver function, electrolyte balance, and blood sugar ...
Fasting Glucose
Measures blood sugar after fasting to screen for diabetes and prediabetes....
Folate
Measures folate levels to help evaluate anemia and pregnancy health....
Hemoglobin A1c (HbA1c)
Reflects average blood sugar over the past 2-3 months....
Urinalysis
Examines urine content to help detect urinary tract infections, kidney disease, and diabetes....
Vitamin B12
Detects B12 deficiency which can cause anemia and neurological symptoms....
Symptoms commonly seen alongside myoclonic seizure
Dysphagia
Difficulty in swallowing....
Fatigue
A subjective feeling of tiredness characterized by a lack of energy and motivation....
Fever
Body temperature elevated above the normal range....
Headache
Cephalgia, or pain sensed in various parts of the head, not confined to the area of distribution of any nerve....
Muscle weakness
Reduced strength of muscles....
Seizure
A seizure is an intermittent abnormality of nervous system physiology characterized by a transient occurrence ...
When to seek care
Seek care from a qualified healthcare provider if myoclonic seizure is severe, persistent, worsening, or accompanied by concerning symptoms. If you think you have a medical emergency, call your local emergency number immediately.
Frequently Asked Questions
What does the symptom myoclonic seizure mean?
Myoclonic seizure is a health sign or symptom described in medical literature. 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.
Which conditions are associated with myoclonic seizure?
Myoclonic seizure has been reported in association with 57 conditions in the medical literature we index, including CDKL5-deficiency disorder, Developmental and epileptic encephalopathy 122, Dursun-Ozgul neurodevelopmental syndrome, Epilepsy of infancy with migrating focal seizures, Houge-Janssens syndrome 4. These associations do not mean you have any of these conditions.
Should I see a doctor about myoclonic seizure?
You should discuss any persistent or concerning symptoms with a qualified healthcare provider. This website does not provide diagnosis. If you have severe symptoms or signs of a medical emergency, seek care immediately.