seizure

seizure

 [se´zhur]

1. the sudden attack or recurrence of a disease.

2. a convulsion or attack of epilepsy.

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.

sei·zure (Sz),

(sē'zhŭr),

1. An attack; the sudden onset of a disease or of certain symptoms.

2. An epileptic attack. Synonym(s): convulsion (2)

[O. Fr. seisir, to grasp, fr. Germanic]

seizure

/sei·zure/ (se´zhur)

1. the sudden attack or recurrence of a disease.

2. a single episode of epilepsy, often named for the type it represents.

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absence seizure  the seizure of absence epilepsy, marked by a momentary break in consciousness of thought or activity and accompanied by a symmetrical 3-cps spike and wave activity on the electroencephalogram.

adversive seizure  a type of focal motor seizure in which there is forceful, sustained turning to one side by the eyes, head, or body.

atonic seizure  an absence seizure characterized by sudden loss of muscle tone.

automatic seizure  a type of complex partial seizure characterized by automatisms, often ambulatory and involving quasipurposeful acts.

clonic seizure  one in which there are generalized clonic contractions without a preceding tonic phase.

complex partial seizure  a type of partial seizure associated with disease of the temporal lobe and characterized by varying degrees of impairment of consciousness and automatisms, for which the patient is later amnestic.

febrile seizures  see under convulsion.

generalized tonic-clonic seizure  the seizure of grand mal epilepsy, consisting of a loss of consciousness and generalized tonic convulsions followed by clonic convulsions.

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.

reflex seizure  an episode of reflex epilepsy.

sensory seizure 

1. a simple partial seizure manifested by paresthesias or other hallucinations, including several types of aura.

2. a reflex seizure in response to a sensory stimulus.

simple partial seizure  a localized type of partial seizure, without loss of consciousness; if it progresses to another type of seizure it is called an aura.

tonic seizure  one characterized by tonic but not clonic contractions.

seizure

(sē′zhər)

n.

A sudden attack, spasm, or convulsion, as in epilepsy or another disorder.

seizure

[sē′zhər]

Etymology: Fr, saisir, to seize

a hyperexcitation of neurons in the brain leading to abnormal electric activity that causes a sudden, violent involuntary series of contractions of a group of muscles. It may be paroxysmal and episodic, as in a seizure disorder, or transient and acute, as after a head concussion. A seizure may be clonic or tonic; focal, unilateral, or bilateral; or generalized or partial. Also called convulsion.

seizure

Neurology A sudden convulsion, due to temporary disruption in electrical activity of the brain Clinical Uncontrollable body movements, sense of unusual smells or tastes, loss of consciousness

Seizures classification

Partial seizures

Simple partial seizures–consciousness preserved

 Motor signs–jacksonian, adversive

 Somatosensory or special sensory symptoms

 Autonomic symptoms or signs

 Psychiatric symptoms

Complex partial seizures–consciousness impaired

 Simple partial seizure, followed by impaired consciousness

 Impaired consciousness at onset

Secondarily generalized seizures

 Simple partial seizure evolving to generalized tonic-clonic seizures

 Complex partial seizure evolving to generalized tonic-clonic seizures

 Simple partial seizure evolving to complex partial seizures, then to generalized tonic-clonic seizures

Generalized-onset seizures

Tonic-clonic seizure

Absence seizure

Atypical absence seizure

Myoclonic seizure

Tonic seizure

Atonic seizure

Localization-related/focal seizures

Idiopathic

 Benign focal epilepsy of childhood

Symptomatic

 Chronic progressive partial continuous epilepsy

 Temporal lobe epilepsy

 Extratemporal epilepsy

Generalized seizures

Idiopathic

 Benign neonatal convulsions

 Childhood absence epilepsy

 Juvenile myoclonic epilepsy

 Other generalized idiopathic epilepsy

Symptomatic

 West syndrome (infantile spasms)

 Early myoclonic encephalopathy

 Lennox-Gastaut syndrome

 Progressive myoclonic epilepsy

Special syndromes

Febrile seizures

Drug-related seizures  

sei·zure

(sē'zhŭr)

1. An attack; the sudden onset of a disease or of certain symptoms.

2. An epileptic attack.
Synonym(s): convulsion (2) .

[O. Fr. seisir, to grasp, fr. Germanic]

seizure

An episode in which uncoordinated electrical activity in the brain causes sudden muscle contraction, either local (partial seizure) or widespread (generalized seizure). Recurrent seizures are called EPILEPSY. Also known as a fit.

Seizure

A sudden attack, spasm, or convulsion.

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seizure

attack/fit

sei·zure

(sē'zhŭr)

1. An attack; sudden onset of disease or some symptoms.

2. An epileptic attack.
Synonym(s): convulsion (2) .

[O. Fr. seisir, to grasp, fr. Germanic]

seizure,

n See epilepsy.

seizure, absence,

n a seizure characterized by sudden interruption of conscious physical and mental activities and a short period of unconsciousness. Formerly known as
petit mal, sometimes simply called
absence.

seizure, clonic phase,

n a seizure's convulsion stage.

seizure, complex partial,

n a seizure stemming from a localized part of the brain indicated by the presence of a state similar to a trance, varying degrees of awareness, and the manifestation of purposeless behaviors or motions. The seizure may be followed by an indeterminate period of confusion, garbled speech, poor mood, and an inability to recall the events of the episode.

seizure, generalized,

n a nonfocalized, convulsive spell that has a simultaneous effect on the entire brain. Formerly known as
grand mal seizure.

seizure, grand mal

n See seizure, generalized.

seizure, simple partial,

n a type of seizure in which only one part of the brain is involved. Patients experiencing this type of seizure may feel intense emotions (joy, fear) or involuntary muscle spasms, depending on the region affected.

seizure

1. the sudden attack or recurrence of a disease.

2. a convulsion or attack of epilepsy.

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audiogenic seizure

a seizure brought on by sound.

cerebral seizure

an attack of epilepsy.

epileptiform seizure

see epileptiform.

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

see Jacksonian epilepsy.

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.

Patient discussion about seizure

Q. SEIZURE what are the causes of a person having a seizure?

A. thank you for the link i will order it--mrfoot56

Q. is there ususlly strange feelings associated with seizures? I am 30 years and i have just been diagnosed with absence seizures. There are some strange feeing that i cannot identify as fear or fustration or anxiety or depression or sadness associated with this new illness. Is it normal? Can it be identified? How can i get rid of all the conditions associated with this disease as well as the absence seizure itself?

A. any affect that the seizures have on your personality (mood change and such)can go away if the condition will be treated. treating epilepsy seizures require first of all a good neurologist. he will help you the treatment that will suite you the most. there are more then one line of treatments in epilepsy.

Q. what are the chances for a one time epileptic seizure? I had an epileptic seizure a few years ago and after all the tests it appeared to be a one time seizure. I know having one indicates my tendency for this kind of seizures so should I be afraid now to do things that might bring it up again- like alcohol, drugs, being exposed to flashing lights or having lack of sleep? what are the chances of it to come back after 5 years? any help will be very appreciated....thanks!

A. After 5 years with no recurrence of seizures after a one time episode, tha chances of having another one are low, almost exact to the general population. I would not advise you to start heavily drinking alcohol and doing drugs, because these things can certainly have an effect, however you need not be afraid.