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A '''fasciculation''', or "muscle twitch", is a small, local, involuntary [[muscle contraction]] and [[:wikt:relaxation|relaxation]]. At times it may be visible under the skin. Deeper areas can be detected by [[Electromyography|EMG]] testing. A fasciculation can happen in any [[skeletal muscle]] in the [[:wikt:body|body]]. Fasciculations can occur in normal healthy people.<ref>Sabyasachi Sircar, ''Principles of Medical Physiology'' (Stuttgart; New York: Thieme, 2008), p. 116</ref> One uncommon reason for them is due to a [[lower motor neuron]] [[lesion]] that may be caused by any of several [[disease]]s. One example would be [[Amyotrophic Lateral Sclerosis]].

A '''fasciculation''', or "muscle twitch", is a small, local, involuntary [[muscle contraction]] and [[:relaxation|relaxation]]. At times it may be visible under the skin. Deeper areas can be detected by [[Electromyography|EMG]] testing. A fasciculation can happen in any [[skeletal muscle]] in the [[:body|body]]. Fasciculations can occur in normal healthy people.<ref>Sabyasachi Sircar, ''Principles of Medical Physiology'' (Stuttgart; New York: Thieme, 2008), p. 116</ref> One uncommon reason for them is due to a [[lower motor neuron]] [[lesion]] that may be caused by any of several [[disease]]s. One example would be [[Amyotrophic Lateral Sclerosis]].

 

== References ==

== References ==

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== Other websites ==

== Other websites ==

*[http://neurology.about.com/b/2012/03/05/what-is-a-fasciculation.htm What is a Fasciculation? About.com]

*[http://neurology.about.com/b/2012/03/05/what-is-a-fasciculation.htm What is a Fasciculation? About.com] {{Webarchive|url=https://web.archive.org/web/20140412010906/http://neurology.about.com/b/2012/03/05/what-is-a-fasciculation.htm |date=2014-04-12 }}

[[Category:Symptoms]]

[[Category:Symptoms]]