myoclonus


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Related to myoclonus: myoclonus epilepsy

myoclonus

[mī′äk·lə·nəs]
(medicine)
Clonic muscle spasm.
Any disorder characterized by scattered, irregular, arrhythmic muscle spasms.
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Infectious or parainfectious myoclonus, such as new-variant Creutzfeldt-Jacob disease (nvCJD); subacute sclerosing panencephalitis (SSPE); viral encephalitis; and streptococcal infections;
The most frequent causes of spinal myoclonus are spinal cord compression, tumour, vascular myelopathy, infection, demyelinating disease, paraneoplastic syndrome and trauma.
Another benefit of DWI, especially in patients with myoclonus, is the short acquisition time (approximately 30-45 seconds).
World Health Organization Diagnostic Criteria for New Variant Creutzfeldt-Jakob Disease Patients must have five of the following six symptoms: * Early psychiatric symptoms * Early persistent paresthesia/dysthesia * Ataxia * Chorea/dystonia or myoclonus * Dementia * Akinetic mutism Patients should meet all the following criteria: * Clinical duration of symptoms >6 months * Age at onset of <50 years * Absences of PrP gene mutation * Electroencephalogram does not show typical periodic appearance * Routine investigations do not suggest an alternative diagnosis * MRI scan shows abnormal bilateral high signal from the pulvinar on axial T-2 and/or proton density weighted images Note: From "Clinical Importance of Bovine Spongiform Encephalopathy, "by C.
If the child has myoclonus or myoclonic eye movements (opsoclonus) in addition to the ataxia, it is important for the physician to look for a neuroblastoma in the chest or abdomen, as these tumors may cause opsoclonus-myoclonus-ataxia syndrome.
Signs and symptoms of rhombencephalitis are irritability, myoclonus, ataxia, and cranial nerve involvement (1).
Posthypoxic myoclonus (PHM) is a rare but devastating complication of these events.
Particularly, it's associated with other neurological or psychiatric manifestations, such as associated myoclonus and associated dystonia," Dr.
Myoclonus is present at some time in the course of the illness in >90% of patients, with hypokinesia, nystagmus, and ataxia in >70% and hyperreflexia, positive Babinski sign, and spasticity in 40% to 80% of cases.
S My son has a rare disorder called opsoclonus myoclonus.
Symptoms of CJD start with changes in mental status, progressing to dementia and particularly characteristic, myoclonus.
NetWitness Corporation, the leading provider of next generation network security monitoring and active threat intelligence software, today announced its second annual "Ride for Kids" event to take place on June 28, 2008 to benefit children diagnosed with Opsoclonus Myoclonus Syndrome (OMS), a rare autoimmune disorder caused by a neuroblastoma, a cancerous tumor, or a virus.