involuntary muscles


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in·vol·un·tar·y mus·cles

muscles not ordinarily under control of the will; other than the heart, they are composed of smooth (nonstriated) muscle fibers, innervated by the autonomic nervous system.

in·vol·un·tar·y mus·cles

(in-vol'ŭn-tar-ē mŭs'ĕlz)
Those muscles not ordinarily under control of the will; except in the case of the heart, they are smooth (nonstriated) muscles, innervated by the autonomic nervous system.
References in periodicals archive ?
In MMD, many of the involuntary muscles that surround the hollow organs can weaken and can also have myotonia.
Once food is swallowed, the involuntary muscles of the esophagus take over.
There are drugs that can control involuntary muscle twitching, disabling cramps and excessive saliva.

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