Presentation
Based on the biochemical results and the genetic studies it is suggested that the family members with progressive familial myoclonic epilepsy present a combination of at least 2 hereditary defects. [ncbi.nlm.nih.gov]
Action and postural tremors were present in both upper limbs more distally, but there were no intention tremors. Myoclonus of the upper limbs and axial musculature was present that was provoked by exposure to torch light and loud clap. [annalsofian.org]
Immune etiologies : celiac disease (uncommon) Unverricht-Lundborg disease This disease is the commonest cause of progressive myoclonus epilepsy, presenting with seizures before 18 years of age. [epilepsydiagnosis.org]
We report here the clinical and anatomopathological features of two young brothers presenting with a progressive myoclonic epilepsy corresponding to type A of the disease according to Berkovic. [link.springer.com]
Entire Body System
- Family History of Epilepsy
Other features suggestive of the diagnosis include normal intelligence, onset around adolescence, and a family history of the condition. [emedicine.medscape.com]
Neurologic
- Myoclonus
Thalamocortical Myoclonus Thalamocortical myoclonus or idiopathic generalized epileptic myoclonus represents the common type of myoclonus in various epileptic syndromes. [neupsykey.com]
The myoclonus in myoclonus-dystonia syndrome is often improved with alcohol. Epileptic Myoclonus This term is used to denote conditions in which myoclonus occurs in the setting of epilepsy (seizure disorders). [bcm.edu]
Progressive myoclonus epilepsy. National Pediatric Myoclonus Center. Division of Child Neurology. Southern Illinois Medical School, Springfield, IL: n.d.; n.p. REVIEW ARTICLES Delgado-Escueta AV, Ganesh S, Yamakawa K. [rarediseases.org]
PROGRESSIVE MYOCLONUS EPILEPSIES Overview Progressive myoclonus epilepsy should considered in a patient with myoclonic seizures, with or without generalized tonic-clonic seizures in the following settings: Progressive cognitive decline Myoclonus resulting [epilepsydiagnosis.org]
myoclonus features (eg, juvenile myoclonic epilepsy syndrome) and from progressive myoclonus epilepsies. • Valproate, levetiracetam, and benzodiazepines are most beneficial treatments. [medlink.com]
- Aura
[…] epilepsies (Autosomal Dominant Nocturnal Familial Frontal lobe Epilepsy) Familial Mesial Temporal lobe epilepsies Familial Lateral Temporal lobe Epilepsy - Autosomal Dominant Epilepsy with Auditory features (Familial Temporal Lobe Epilepsy with Auditory Auras [swedish.org]
Clonic Seizures Similar to GTCS Rhythmic or semi-rhythmic contractions of a group of muscles Jerks can involve any group of muscles: arm, face > legs Atonic Seizures: Begin in the late infancy; may start in adolescence Sudden loss of muscle tone; no aura [neurodiffdx.com]
Delasiauve (1854), Reynolds (1861), Féré (1890), Binswanger (1899), and Gowers (1902) described sudden starts or jerks as expressions of motor prodromes, auras, or abortive seizures ( petit mal moteur ) in their monographs on epilepsy. [neupsykey.com]
[…] lipofuscinosis, neuronal, Spinocerebellar ataxia ATP1A2 Alternating hemiplegia of childhood, Migraine, familial hemiplegic ATP1A3 Alternating hemiplegia of childhood CACNA1A Episodic ataxia, Migraine, familial hemiplegic KCNK18 Migraine, with or without aura [genda.com.ar]
- Abnormal Involuntary Movement
This volume focuses on Parkinsonism and dyskinesia, a condition characterized by abnormal involuntary movements. [books.google.de]
Workup
EEG is required to distinguish myoclonic seizures from nonictal causes of myoclonus, which can arise from lesions of the cortex, brainstem, spinal cord, or even peripheral nerve (see Workup). [emedicine.medscape.com]
EEG
- 3-4 Hz Spikes
Childhood absence epilepsy with tonicclonic seizures and electroencephalogram 3-4-Hz spike and multispikeslow wave complexes: linkage to chromosome 8q24. Am J Hum Genet. [books.google.es]
- Generalized Spike-and-Slow-Waves
We got the EEG record in three affected members, and all of them showed paroxysm of sharp and slow wave in the posterior leads, with generalized spike and slow wave discharges on IPS. [annalsofian.org]
- Multifocal Spikes
Cortical myoclonus is more commonly encountered in a multifocal form, presenting with multifocal spike discharges. If myoclonus is triggered by stimuli, the term cortical reflex myoclonus is used. [neupsykey.com]
- Spike-and-Slow-Waves
We got the EEG record in three affected members, and all of them showed paroxysm of sharp and slow wave in the posterior leads, with generalized spike and slow wave discharges on IPS. [annalsofian.org]
Treatment
In consequence of the biochemical findings combined treatment with A and E vitamins has been initiated. [ncbi.nlm.nih.gov]
Botulinum toxin treatment of facial myoclonus in suspected Rasmussen encephalitis. Mov Disord. 2006;21:1500-2. Caviness JN. Treatment of Myoclonus. Neurotherapeutics. 2014;11(1):188-200. Caviness JN, Brown P. [bcm.edu]
Organized into 18 chapters, this book first elucidates the problems, causes, pathology, brain neurotransmitter changes and receptors, depression, dementia, fluctuations of disability, and treatment of Parkinson's disease. [books.google.de]
Levetiracetam for the treatment of idiopathic generalized epilepsy with myoclonic seizures. Neurology 2008; 70:607–616. CrossRef PubMed Google Scholar 10. Magaudda A, Gelisse P, Genton P. [link.springer.com]
CLOSE Medical Disclaimer The medical information on this site is provided as an information resource only, and is not to be used or relied on for any diagnostic or treatment purposes. [diseaseinfosearch.org]
Prognosis
Prognosis The prognosis depends heavily on the underlying etiology and the epilepsy syndrome. Patients with a benign syndrome typically respond well to medication and may outgrow their epilepsy. [emedicine.medscape.com]
The prognosis is very poor; death occurring at an average of 4–6 years after the onset. 49. [slideshare.net]
Opsoclonus-myoclonus syndrome: a new era of improved prognosis? Pediatr Neurol. 2017;72:65-9. Jankovic, J. Therapeutic developments for tics and myoclonus. Mov Disord. 2015;30(11):8. Jankovic J, Shannon KM. Movement disorders. [bcm.edu]
Etiology
Etiology Seizures associated with early myoclonic encephalopathy can be due to a number of etiologies. [emedicine.medscape.com]
Metabolic etiologies : mitochondrial disorders (MERRF), neuronal ceroid lipofuscinosis, sialidosis. [epilepsydiagnosis.org]
Applicable To Drug-induced myoclonus Palatal myoclonus Use Additional Use Additional Help Certain conditions have both an underlying etiology and multiple body system manifestations due to the underlying etiology. [icd10data.com]
Epilepsy due to perinatal insults Epilepsy due to malformations of cortical development 4/16 Chandler Preston Chandler Epilepsy due to mitochondrial and metabolic disorders Benign neonatal seizures Breath holding spells 5/7 Chandler Amy Amy Cardiac etiologies [loyolamedicine.org]
Detailed mutation modeling such as this will be required to understand how molecular perturbations underlie the etiology of epilepsy syndromes. [genomemedicine.biomedcentral.com]
Epidemiology
Página 67 - Socioeconomic characteristics of childhood seizure disorders in the New Haven area: an epidemiologic study Página 67 - Epilepsy after penetrating head injury. I. Clinical correlates: a report of the Vietnam Head Injury Study. [books.google.es]
Epidemiology PME accounts for less than 1% of epilepsy cases at specialist centres. The incidence and prevalence of PME is unknown, but there are considerable geography and ethnic variations amongst the specific genetic disorders. [wikidoc.org]
Epidemiology [ edit ] PME accounts for less than 1% of epilepsy cases at specialist centres. [ citation needed ] The incidence and prevalence of PME is unknown, but there are considerable geography and ethnic variations amongst the specific genetic disorders [en.wikipedia.org]
Epidemiology The incidence of myoclonic epilepsy is approximately 1 case in 40,000 children. Typically, the onset of these disorders is during the first 3 years of life. [emedicine.medscape.com]
Pathophysiology
Impaired attention, genetics, and the pathophysiology of schizophrenia. [books.google.es]
The nosology and pathophysiology of myoclonus. Mov Disord 1982:196–248. Google Scholar 2. Fahn S, Marsden CD, Van Woert MH. Definition and classification of myoclonus. Adv Neurol 1986; 43:1–5. PubMed Google Scholar 3. Nirenberg MJ, Frucht SJ. [link.springer.com]
However, because giant SEPs are not always present in patients with cortical reflex myoclonus (as in dentatorubral-pallidoluysian atrophy [DRPLA]), some other pathophysiologic mechanisms may exist. FIGURE 4. [neupsykey.com]
Pathophysiology Myoclonic seizures are generally the product of hypersynchronous, generalized cortical discharges. These discharges arise from hyperexcitable neuronal networks. [emedicine.medscape.com]
Migraine and epilepsy: a focus on overlapping clinical, pathophysiological, molecular, and therapeutic aspects. Curr Pain Headache Rep 2010; 14 (4) 276-283 152 Silberstein SD, Dodick DW. Migraine genetics: Part II. [thieme-connect.com]
Prevention
Hospital for Sick Children Health A-Z Search a complete list of child health articles expand_more View All Drug A-Z Search a list of articles about medications expand_more View All Learning Hubs Browse a complete list of content groups Healthy Living & Prevention [aboutkidshealth.ca]
This medication is directly injected into the muscles causing the involuntary jerks at relatively low doses, allowing for relaxation of the muscles, thus preventing the spasms. [bcm.edu]
Researchers believe that laforin and malin may prevent a potentially damaging buildup of glycogen in tissues that do not normally store this molecule, such as those of the nervous system. [neurologyindia.com]