| convulsion | <neurology> A violent involuntary contraction or series of contractions of the voluntary muscles. Origin: L. Convulsio, from convellere = to pull together (18 Nov 1997) |
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| convulsions | Seizures manifested by discontinuous involuntary skeletal muscular contractions, either brief contractions repeated at short intervals or longer ones interrupted by intervals of muscular relaxation. (12 Dec 1998) |
| convulsions, febrile | Seizures occurring in young children during febrile episodes due to a low convulsive threshold. The convulsions are usually a self-limiting disorder after the age of 5 years. (12 Dec 1998) |
| mimic convulsion | Involuntary twitching of the facial muscles, sometimes unilateral. Synonym: Bell's spasm, convulsive tic, facial spasm, histrionic spasm, mimic convulsion, mimic spasm, mimic tic, palmus, prosopospasm. (05 Mar 2000) |
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| clonic convulsion | A convulsion in which the contractions are intermittent, the muscles alternately contracting and relaxing. (05 Mar 2000) |
| complex febrile convulsion | A febrile convulsion that is prolonged (greater than 15 minutes' duration) or is associated with focal neurological deficits. (05 Mar 2000) |
| coordinate convulsion | A clonic convulsion in which the movements are seemingly purposeful, being exaggerations of those that may occur naturally. (05 Mar 2000) |
| hysterical convulsion | See: hysteria. (05 Mar 2000) |
| immediate posttraumatic convulsion | A convulsion beginning very soon after injury. (05 Mar 2000) |
| infantile convulsion | Any convulsion occurring in infancy (0 to 2 years of age). (05 Mar 2000) |
| tetanic convulsion | A convulsion in which muscle contraction is sustained. Synonym: tetanic convulsion, tonic seizure. (05 Mar 2000) |
| tonic convulsion | A convulsion in which muscle contraction is sustained. Synonym: tetanic convulsion, tonic seizure. (05 Mar 2000) |
| ether convulsion | A convulsion occasionally associated with divinyl and diethyl ether anaesthesia. (05 Mar 2000) |
| febrile convulsion | A brief seizure, lasting less than 15 minutes, seen in a neurologically normal infant or young child, associated with fever. Synonym: febrile seizure. (05 Mar 2000) |