seizure threshold


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Related to seizure threshold: ataxia

seizure threshold

the amount of stimulus necessary to produce a convulsive seizure. All humans can have seizures if the provocation is sufficient.

seizure threshold

The level of neurological stimulation capable of precipitating a seizure.
See also: threshold

seizure

1. the sudden attack or recurrence of a disease.
2. a convulsion or attack of epilepsy.

audiogenic seizure
a seizure brought on by sound.
cerebral seizure
an attack of epilepsy.
epileptiform seizure
focal seizure
see partial seizure (below).
generalized seizure
see grand mal seizure (below).
grand mal seizure
one with no localizing signs. After a brief period of restlessness, there is unconsciousness, generalized muscular activity, excessive salivation, chewing activity, opisthotonos, running movements, and often urination and defecation. The most common type of seizure in dogs and cats.
Jacksonian seizure
partial seizure
one restricted to a focus in the brain; signs correspond to the area affected, e.g. motor activity of an isolated area or limb, hallucinations such as fly catching, apparent blindness, behavioral abnormalities, etc. Called also focal seizures.
petit mal seizure
a mild, very brief generalized seizure. See also petit mal.
photogenic seizure
a seizure brought on by light.
psychomotor seizure
motor seizures accompanied by a psychic stage. There are hallucinations, salivation, pupillary dilatation, mastication, fecal and urinary excretion, and wild running. Seen in dogs with lesions in the pyriform lobe or hippocampus and from poisoning with agenized flour (canine hysteria). Called also running fits.
tetanic seizure
see tetany.
seizure threshold
the level of stimulation at which a seizure is precipitated.
tonic seizure
one in which the muscles are rigid.
tonic-clonic seizure
alternating tonic (rigid muscles) and clonic (jerking of muscles) phases; a grand mal seizure.
References in periodicals archive ?
The seizure threshold can be higher in the elderly population and this may increase the difficulty of eliciting effective seizures.
The convulsant effects of cocaine are probably related to its local anaesthetic properties (similar to seizures occurring with lignocaine toxicity), while hyperthermia and acidosis may also contribute to a lowered seizure threshold.
Home Secretary Charles Clarke is to consult on whether the cash seizure threshold under the Proceeds of Crime Act should be lowered from pounds 5,000 to pounds 1,000.
In 1964, Forster and his co-workers (Forster, Ptacek, Peterson, Chun & Bengzon, 1964) publish a study showing that it is possible to alter the seizure threshold through the process of habituation.
Animal studies have shown that a drop in serum levels of the endogenous neurosteroid allopregnanolone, a progesterone metabolite, lower the seizure threshold.
Lindane is contraindicated in patients who are using drugs that lower the seizure threshold such as antipsychotic drugs, benzodiazepines, systemic steroids, quinolone antibiotics, and antimalarials.
It is possible however, to inherit a lower seizure threshold which could make an individual more susceptible to developing the condition.
There are numerous possible causes, but it may develop spontaneously without the involvement of other factors if a person has a low seizure threshold.
He had been using a wide variety of substances including cannabis and Salvia divinorum, both hallucinogens that can affect seizure threshold in susceptible people.
Clomipramine (Anafranil) may also cause dry mouth, dizziness and constipation (so-called anti-cholinergic side effects) as well as heart rhythm changes (baseline EKG monitoring is necessary) and a lowering of the seizure threshold (making it a more problematic medication in individuals with seizures).
Childhood epilepsy (ie, seizures first occurring between the ages of 2 and 18 years of age with no known cause) probably is due to a genetically inherent low seizure threshold.