involuntary muscle


Definition of involuntary muscle

: muscle governing reflex functions and not under direct voluntary control especially : smooth muscle

Examples of involuntary muscle in a Sentence

Recent Examples on the Web Movement disorders were also symptoms of a post-COVID brain, including tremors, involuntary muscle contractions, epileptic seizures, hearing and vision abnormalities, and balance and coordination difficulties. Vanessa Etienne, Peoplemag, 23 Sep. 2022 The first and mildest stage is heat cramps, which are characterized by involuntary muscle spasms. Joanna Thompson, Scientific American, 11 Aug. 2022 Tremors—involuntary muscle contractions—were found to show up as many as 10 years before a Parkinson's diagnosis, becoming more frequent in the two years leading up to one. Jocelyn Solis-moreira,, 1 Apr. 2022 Muscle spasms, or sudden involuntary muscle contractions, are pretty common. Carolyn L. Todd, SELF, 20 Oct. 2021 The neurological symptoms can be things such as a shaking head, an inability to stand, involuntary muscle spasms in general. Maddie Bender, Scientific American, 13 Aug. 2021 Nine months before the pandemic hit, Amber nearly died from a series of involuntary muscle contractions. Chris Serres, Star Tribune, 5 Mar. 2021 The former nurse suffers from a condition called dystonia, which causes involuntary muscle jerks. al, 15 Nov. 2020 Other side effects include depression, anxiety, skin rash, headache, dizziness, nausea, involuntary muscle twitches, and potentially fatal heart issues. Camela Thompson, STAT, 20 May 2020 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'involuntary muscle.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of involuntary muscle

1840, in the meaning defined above

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Time Traveler for involuntary muscle

Time Traveler

The first known use of involuntary muscle was in 1840

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Dictionary Entries Near involuntary muscle

involuntary manslaughter

involuntary muscle


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Statistics for involuntary muscle

Last Updated

29 Sep 2022

Cite this Entry

“Involuntary muscle.” Dictionary, Merriam-Webster, Accessed 7 Oct. 2022.

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More Definitions for involuntary muscle

involuntary muscle


Medical Definition of involuntary muscle

: muscle governing reflex functions and not under direct voluntary control especially : smooth muscle

More from Merriam-Webster on involuntary muscle Encyclopedia article about involuntary muscle


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