Disease Information for Paramyoclonus multiplex

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Clinical Manifestations
Signs & Symptoms
Abnormal movements/involuntary
Extrapyramidal signs
Myoclonus/Myoclonic jerks on exam
Polymyoclonus
Disease Progression
Course/Chronic disorder
Course/Chronic only
Demographics & Risk Factors
Population Group
Child
Population/Pediatrics population
Sex & Age Groups
Population/Child
Population/Child-Infant Only
Population/Children/all
Associated Diseases & Rule outs
Associated Disease & Complications
Extrapyramidal disease/manifestation
Disease Mechanism & Classification
Class
CLASS/Pediatric disorders (ex)
CLASS/Muscle disorder (ex)
CLASS/Muscle/tendon/extremities (category)
CLASS/Neurologic (category)
Process
PROCESS/Congenital/developmental (category)
Synonyms
Synonym
multiplex, Paramyoclonus multiplex, Synonym/Benign essential myoclonia, Synonym/Friedreich's disease
Definition

Involuntary shock-like contractions, irregular in rhythm and amplitude, followed by relaxation, of a muscle or a group of muscles; This condition may be a feature of some CENTRAL NERVOUS SYSTEMS DISEASES (e.g., EPILEPSY, MYOCLONIC). Nocturnal myoclonus may represent a normal physiologic event or occur as the principal feature of the NOCTURNAL MYOCLONUS SYNDROME; (From Adams et al, Principles of Neurology, 6th ed, pp102-3);-------------------------------.Myoclonus, General; Subdivisions:Action Myoclonus; Arrhythmic Myoclonus; Dyssynergia Cerebellaris Myoclonica; Familial Arrhythmic Myoclonus; Hereditary Essential Myoclonus; Infantile Myoclonic Encephalopathy and Polymyoclonia; Intention Myoclonus; Nocturnal Myoclonus; Opsoclonus; Palatal Myoclonus; Paramyoclonus Multiple; Pathological Myoclonus; Postanoxic Intention Myoclonus; Postencephalitic Intention Myoclonus; Progressive Myoclonic Epilepsy; Respiratory Myoclonus; Rhythmical Myoclonus; Segmental Myoclonus; Stimulus-Sensitive Myoclonus; Myoclonus is a neurological movement disorder characterized by sudden, involuntary contractions of skeletal muscles; Based on the various symptoms, there are three types of Myoclonus: Intention Myoclonus, Rhythmical Myoclonus, and Arrhythmic Myoclonus;

Intention Myoclonus (Action Myoclonus) includes Postanoxic Myoclonus and Postencephalitic Myoclonus; Arrhythmic Myoclonus (stimulus-sensitive myoclonus) includes: Hereditary Essential Myoclonus (paramyoclonus multiplex), Hyperexplexia (Essential Startle Disease), Opsoclonus (Infantile Myoclonic Encephalopathy, Polymyoclonia Familial Arrhythmic Myoclonus), Progressive Myoclonic Epilepsy, Ramsay Hunt Syndrome (Dyssynergia Cerebellaris Myoclonia);

Rhythmical Myoclonus includes (Segmental Myoclonus), Nocturnal Myoclonus, Palatal Myoclonus, and Respiratory Myoclonus; [NORD]

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Harrison's Online (accessmedicine)
NEJM (The New England Journal of Medicine)
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