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Absence seizure information


Absence seizure
Other namesPetit mal seizures
Pronunciation
  • /ˈæbsəns ˈsʒər/ or /ɑːbˈsɑːns ˈsʒər/
SpecialtyNeurology

Absence seizures are one of several kinds of generalized seizures. In the past, absence epilepsy was referred to as "pyknolepsy," a term derived from the Greek word "pyknos," signifying "extremely frequent" or "grouped".[1] These seizures are sometimes referred to as petit mal seizures (from the French for "little illness", a term dated to the late 18th century);[2] however, usage of this terminology is no longer recommended.[1] Absence seizures are characterized by a brief loss and return of consciousness, generally not followed by a period of lethargy (i.e. without a notable postictal state). Absence seizures are most common in children. They affect both sides of the brain.[3][4]

Childhood absence epilepsy represents a significant portion, accounting for approximately 10 to 17%, of all cases of childhood-onset epilepsy, establishing it as the most common form of pediatric epilepsy. This syndrome is characterized by daily occurrences of frequent but brief episodes of staring spells. These episodes typically commence between the ages of 4 to 8 years and manifest in otherwise seemingly healthy children. On classic electroencephalograms (EEGs), distinct patterns emerge, featuring generalized spike-wave bursts occurring at a frequency of 3 Hz, accompanied by normal background brain activity. Despite sometimes being mistakenly perceived as a benign type of epilepsy, childhood absence epilepsy is associated with varying rates of remission. Children affected by this condition often experience cognitive deficits and encounter enduring psychosocial challenges in the long term.[5]

  1. ^ a b Albuja, A. C., & Khan, G. Q. (2022). Absence Seizure. In StatPearls. StatPearls Publishing.
  2. ^ Daly, D. D. (1968). "Reflections on the Concept of Petit Mal". Epilepsia. 9 (3): 175–8. doi:10.1111/j.1528-1157.1968.tb04618.x. PMID 4975023. S2CID 45169328.
  3. ^ "Absence Seizures". Epilepsy Foundation. Retrieved 2021-12-18.
  4. ^ "Ethosuximide - an overview | ScienceDirect Topics". www.sciencedirect.com. Retrieved 2021-12-18.
  5. ^ Cite error: The named reference pmid20200383 was invoked but never defined (see the help page).

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injuries. Not all generalized seizures produce convulsions. For example, in an absence seizure, also known as a petit mal seizure, the brain experiences electrical...

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and without absences, eye-closure-induced seizures, EEG paroxysms, or both, and photosensitivity. Eyelid myoclonia with or without absences is a form of...

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Generalized seizures can be either absence seizures, myoclonic seizures, clonic seizures, tonic-clonic seizures or atonic seizures. Generalized seizures occur...

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Phenytoin

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anti-seizure medication. It is useful for the prevention of tonic-clonic seizures (also known as grand mal seizures) and focal seizures, but not absence seizures...

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antiseizure drugs, or anti-seizure medications (ASM)) are a diverse group of pharmacological agents used in the treatment of epileptic seizures. Anticonvulsants...

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is only one seizure type observed at time of diagnosis: typical absence seizure. Typical absence seizure is a generalized onset seizure characterized...

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period of a few hours up to a day or two. Absence seizures do not produce a postictal state and some seizure types may have very brief postictal states...

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Photosensitive epilepsy

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nature and severity of the resulting seizures (ranging from brief absence seizures to full tonic–clonic seizures). Many PSE patients experience an "aura"...

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GAERS

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discharges (SWD) evocative of absence seizures in Wistar rats during cortical electroencephalographic (EE) recordings. These seizures were recorded on both sides...

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Valproate

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are useful for the prevention of seizures in those with absence seizures, partial seizures, and generalized seizures. They can be given intravenously...

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types of seizures, including: Focal aware seizures/auras Focal impaired aware seizures Absence seizures Myoclonic jerks Tonic-clonic seizures An uptick...

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generalized-onset seizures and include both the idiopathic generalized epilepsies (specifically childhood absence epilepsy, juvenile absence epilepsy, juvenile...

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alternative or adjuvant medication for partial seizures, such as absence seizure, myoclonic seizure, and atonic seizures. A 2020 review on the use of lamotrigine...

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or of types that do not involve contractions, such as absence seizures or complex partial seizures. Status epilepticus is a life-threatening medical emergency...

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phenytoin and valproate for focal and generalized seizures. It is not effective for absence or myoclonic seizures. Carbamazepine was discovered in 1953 by Swiss...

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Thalamocortical radiations

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rhythms involved with the sleep-wakefulness cycle, ultimately causing absence seizures and other forms of epileptic behavior. Burst firing within a part of...

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Ethosuximide

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the brand name Zarontin among others, is a medication used to treat absence seizures. It may be used by itself or with other antiseizure medications such...

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Juvenile myoclonic epilepsy

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also characterized by generalized tonic–clonic seizures, and a minority of patients have absence seizures. It was first described by Théodore Herpin in...

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person they know has epilepsy, even if the seizures are controlled by medication. If the employee has a seizure while at work, they could harm themselves...

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CACNA1G

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CACNA1G gene. It is one of the primary targets in the pharmacology of absence seizure. Cav3.1 is a type of low-voltage-activated calcium channel, also known...

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