Focal myoclonic seizure
A type of focal motor seizure characterized by sudden, brief (<100 ms) involuntary single or multiple contraction(s) of muscles(s) or muscle groups of variable topography (axial, proximal limb, distal). Myoclonus is less regularly repetitive and less sustained than is clonus.
Also called: Focal myoclonic seizures, Local myoclonic seizures, Localised myoclonic seizure, Localized myoclonic seizure, Partial myoclonic seizure, Partial myoclonic seizures, Segmental myoclonic seizure, Segmental myoclonic seizures.
Conditions associated with focal myoclonic seizure
The following conditions have been associated with focal myoclonic seizure in medical literature. This is informational and not a diagnosis.
Isolated succinate-CoQ reductase deficiency
Isolated succinate-CoQ reductase deficiency is a medical condition that may be associated with various symptom...
Kohlschutter-Tonz syndrome-like
Kohlschutter-Tonz syndrome-like is a medical condition that may be associated with various symptoms and signs....
Landau-Kleffner syndrome
Landau-Kleffner syndrome is a medical condition that may be associated with various symptoms and signs....
Primary hyperaldosteronism-seizures-neurological abnormalities syndrome
Primary hyperaldosteronism-seizures-neurological abnormalities syndrome is a medical condition that may be ass...
Pyridoxine-dependent-developmental and epileptic encephalopathy
Pyridoxine-dependent-developmental and epileptic encephalopathy is a medical condition that may be associated ...
Spastic paraplegia-severe developmental delay-epilepsy syndrome
Spastic paraplegia-severe developmental delay-epilepsy syndrome is a medical condition that may be associated ...
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 119
A developmental and epileptic encephalopathy caused by the variants in the RNU2-2 gene, in which most reported...
mitochondrial DNA depletion syndrome 4a
A cerebrohepatopathy and a rare and severe form of mitochondrial DNA (mtDNA) depletion syndrome characterized ...
Tests providers may use to investigate focal myoclonic seizure
When investigating focal 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 ...
Urinalysis
Examines urine content to help detect urinary tract infections, kidney disease, and diabetes....
Symptoms commonly seen alongside focal myoclonic seizure
Constipation
Infrequent or difficult evacuation of feces....
Depression
Frequently experiencing feelings of being down, miserable, and/or hopeless; struggling to recover from these m...
Dysphagia
Difficulty in swallowing....
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....
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 focal 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 focal myoclonic seizure mean?
Focal myoclonic seizure is a health sign or symptom described in medical literature. A type of focal motor seizure characterized by sudden, brief (<100 ms) involuntary single or multiple contraction(s) of muscles(s) 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 focal myoclonic seizure?
Focal myoclonic seizure has been reported in association with 9 conditions in the medical literature we index, including Isolated succinate-CoQ reductase deficiency, Kohlschutter-Tonz syndrome-like, Landau-Kleffner syndrome, Primary hyperaldosteronism-seizures-neurological abnormalities syndrome, Pyridoxine-dependent-developmental and epileptic encephalopathy. These associations do not mean you have any of these conditions.
Should I see a doctor about focal 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.