A spasm; involuntary contraction or twitching, usually of the facial and shoulder muscles.
An involuntary, sudden, rapid, recurrent, nonrhythmic, stereotyped motor movement or vocalization. A tic may be an expression of an emotional conflict, the result of neurological disease, the effect of a drug (especially a stimulant or other dopamine agonist), or a combination of these.
An involuntary twitch of the muscles usually in the face.
A repetitive, rapid, sudden, and involuntary movement, spasm, or twitch that usually affects muscles in the face, neck, or shoulders, including the throat and voice. A person with a tic experiences the movement as irresistible but can suppress it for a limited period of time. Tics tend to worsen during periods of stress or focused concentration and usually disappear during sleep. The action in a tic can be simple (for example, repeating a single word, grunting, or grimacing) or complex (for example, repeating phrases or sentences, jumping, or stamping the feet). Tics can be precipitated or worsened by medication. Tics are also a principal feature of the neurological disorder known as Tourette syndrome. The underlying cause of tics is unknown.
A repeated and largely involuntary movement varying in complexity from the twitch of a muscle to elaborate well-coordinated actions. Tics most often become prominent when the individual is exposed to emotional stress.
A repetitive, usually involuntary spasm that varies from being the simple twitch of a muscle for example, affecting an eyelid to complex coordinated actions. Emotional stress is a common cause.
A spasmodic muscular contraction, most commonly involving the face, mouth, eyes, head, neck, or shoulder muscles. The spasms may be tonic or clonic. The movement appears purposeful, is often repeated, is involuntary, and can be inhibited for a short time only to burst forth with increased severity.
An abrupt, involuntary action that is challenging or impossible for an individual to control. Tics can manifest as either motor-related (associated with movement) or vocal expressions, and they might intensify when subjected to stress.