it is the involuntary contractions and relaxations of a group of a muscle fibers. as a result of spontanous depolarization. of lower motor neurone .it occures in anormal person or in adiseases states
CAUSES…
1-motor neuron diseases like.poliomyelitis…amyotrophic latral sclerosis.and spinal muscular atrophies
2-thyrotoxicosis
3-cervical spondylosis
4-syrengiomylia
5-metabolic …like sever hyponatraemia.and sever hypomagnesaemia
6-drugs…like anticholinergics…acetylcholein inhibitors.benzodiazapine.clofibrates.lithium & salbutamol
7-those occuring in healthy individuals are called benign faciculation syndrome