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spasm, involuntary rigid muscle contraction, often persistent and often accompanied by pain. It usually has some underlying physical cause such as disease, strain, or injury to the muscle or nearby tissues, impairment of circulation, or a disturbance of body chemistry. The spasm may be confined to one group of muscles or it may be severe and fairly generalized, as in convulsions. Painless localized spasms are called tics. These purposeless movements, usually of some part of the face, may begin as purposeful movement in response to some stimulus but eventually are carried out automatically, apparently without reason. They may disappear spontaneously after a time, or may require the elimination of some physical or psychic cause.
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The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



an involuntary muscular contraction; a form of hyperkinesia. A tic may be related to the effect of encephalitis on parts of the brain; it may be a congenital pathological condition, frequently associated with a neuropathic personality; it may appear with attacks of trigeminal neuralgia (tic douloureux); or it may result from neuritis of the facial nerve. A distinction is made between generalized tics, involving all the muscles, and local tics, which are more common. The muscles usually affected are those of the face and neck. The twitching resembles such voluntary movements as winking, frowning, lip-smacking, or lip-licking. Tics generally disappear during sleep and become more severe under emotional stress. Treatment consists of the administration of sedatives, tranquilizers, and anticonvulsants.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


spasmodic twitching of a particular group of muscles
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005


(Token Ring Interface Card) Slang for a Token Ring NIC (network interface card). See token ring network.
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References in periodicals archive ?
Varios son los motivos por los que las TIC pueden no estar utilizandose en las aulas con alumnado, con o sin discapacidad intelectual.
TiC commenting on the recent social media statement made by world acclaimed Nigerian top notch afrobeat artiste Wizkid that he got inspiration from him, he said
The holdings of these types of portfolio investment are collected in the TIC system with other investment instruments, such as loans and deposits.
At least 20% of elementary school-age children develop tics, such as excessive blinking, throat clearing or sniffing, but they don't become a long-term problem.
Tic Toe also offers individual services like brakes, premium oil changes and a summer road trip package, and convenience fees on those services are waived for members.
KEYWORDS: Tic Disorder, Glial Cell Line-Derived Neurotrophic Factor (GDNF), Nerve Growth Factor (NGF), Neurotrophic factor.
The Australian tourists thanked TIC officials for briefing on various culture and tourists resorts of the areas.
He said that in this connection, University of Management and Technology (UMT) is providing support to PTDC for printing of publications, club cards and annual advertisements on World Tourism Day, adding that TICs will be re-shaped on modern lines.