II. Definitions
- Myoclonus (Myoclonic Jerk)
- Brief, sudden onset, non-rhythmic, involuntary, shock-like mucle jerking
III. Causes
- Myoclonic Epilepsy
- Physical Encephalopathy (e.g. Heat Stroke, Electrical Injury)
- Viral Encephalopathy (e.g. HSV Encephalitis)
- Focal CNS Injury (e.g. Trauma, tumor)
- Biological Neurotoxin Exposure
- Anoxia
- Nocturnal Myoclonus Syndrome (Periodic Limb Movement)
- Metabolic causes
- Hyponatremia
- Hypoglycemia
- Hepatic Failure
- Renal Failure
- Hashimoto's Thyroiditis (Hashimoto's Encephalopathy)
- Toxic Causes
-
Inborn Errors of Metabolism
- Glycogen Storage Disease
- Carboxylase Deficiency
- Degenerative Disorders
- Creutzfeldt-Jacob Disease
- Huntington Chorea
- Parkinson's Disease
- Alzheimer's Disease