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1. the sudden attack or recurrence of a disease.
absence seizure the seizure seen in petit mal epilepsy, marked by a momentary break in the stream of thought and activity, accompanied by a symmetrical spike and wave at 3 cycles per second on the electroencephalogram. Called also petit malseizure. See epilepsy.
atonic seizure an absence seizure characterized by sudden loss of muscle tone.
complex partial seizure see partial seizure.
febrile seizure febrile convulsion.
focal seizure partial seizure.
focal motor seizure a simple partial seizure consisting of clonus or spasm of a muscle or muscle group, occurring either singly or in a continuous repetitive series.
generalized tonic-clonic seizure (grand mal seizure) the seizure seen in grand mal epilepsy, marked by loss of consciousness and generalized tonic convulsions followed by clonic convulsions. See epilepsy.
jackknife s's infantile spasms.
myoclonic seizure one characterized by a brief episode of myoclonus.
partial seizure any seizure due to a lesion in a specific, known area of the cerebral cortex; symptoms vary with different lesion locations. A simple partial seizure is the most localized type, with a discharge that is predominantly one-sided or presents localized features without loss of consciousness. A complex partial seizure is associated with disease of the temporal lobe and characterized by varying degrees of impairment of consciousness. See epilepsy.
petit mal seizure absence seizure.
reflex seizure (sensory seizure) an epileptic seizure in response to a sensory stimulus, which may be tactile, visual, auditory, or musical.
simple partial seizure see partial seizure.
tonic-clonic seizure see generalized tonic-clonic seizure.
a brief seizure, lasting less than 15 minutes, seen in a neurologically normal infant or young child, associated with fever.
Synonym(s): febrile seizure
a seizure associated with a febrile illness. Treatment depends on the age of the patient and the number of seizures. Generalized recurrent febrile seizures in children may be treated as grand mal epilepsy.
febrile seizureFever-induced seizure Pediatrics A generalized tonic-clonic–grand mal seizure seen in infants to toddlers after rapidly rising fevers lasting from seconds to minutes; most are idiopathic; FSs may be more common in families DiffDx Various intoxications, meningitis, encephalitis, roseola, or infection with HHV6,.Shigella
Convulsions brought on by fever.
Mentioned in: Fever