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involuntary muscle
noun
: 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
Reported symptoms have included seizures, involuntary muscle contractions, loss of consciousness, confusion, vomiting and abnormal heart rates, according to the FDA.
—
Maya Davis, CNN, 3 July 2024
Reported symptoms include seizures, agitation, involuntary muscle contractions, loss of consciousness, confusion, sleepiness, nausea and vomiting, abnormal heart rates, and hyper/hypotension.
—
Kate Gibson, CBS News, 28 June 2024
Hemme was being treated with antipsychotic drugs that had triggered involuntary muscle spasms when she was first questioned.
—
Landon Mion, Fox News, 16 June 2024
Focal dystonia, a neurological disorder that causes involuntary muscle spasms, may also cause the twisties.
—
Colleen Murphy, Health, 22 Mar. 2024
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These examples are programmatically compiled from various online sources to illustrate current usage of the word 'involuntary muscle.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Word History
First Known Use
1840, in the meaning defined above
Time Traveler
The first known use of involuntary muscle was
in 1840
Dictionary Entries Near involuntary muscle
Cite this Entry
“Involuntary muscle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/involuntary%20muscle. Accessed 27 Jul. 2024.
Kids Definition
involuntary muscle
nounMedical Definition
involuntary muscle
noun
: muscle governing reflex functions and not under direct voluntary control
especially
: smooth muscle
More from Merriam-Webster on involuntary muscle
Britannica.com: Encyclopedia article about involuntary muscle
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