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A member asked:
What is the difference between spasms and fasciculations?
5 doctors weighed in across 2 answers
Specific: Fasciculations are a type of spasm due to loss or impairment of upper motor neurons, causing the lower ones to fire inappropriately.
Answered 8/6/2020
5.2k views
Contraction & relaxa: Another way of looking at it is: fasciculations are involuntary muscle contraction and relaxation whereas muscle spasm is involuntary and sustained muscle contraction. Fasciculations can be deep and detected on a muscle needle test or can be felt and be visible to the eye as muscle twitches.
Answered 10/3/2016
5.2k views
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