focal epilepsy
Definition
Noun A type of epilepsy characterized by seizures that originate in and are initially confined to one specific, localized area of one hemisphere of the brain. The seizure's initial symptoms reflect the function of that specific brain region.
Usage
Focal epilepsy is a medical term used to classify and describe a specific category of epileptic disorder. It contrasts with generalized epilepsy, where seizures involve both brain hemispheres from the onset.
Examples
- The neurologist diagnosed the patient with focal epilepsy after an EEG showed abnormal activity originating in the temporal lobe.
- Seizures in focal epilepsy can sometimes become generalized, spreading to affect the entire brain.
- Treatment for focal epilepsy may include medication or, in some cases, surgery to remove the specific brain focus.
Advanced Usage
- Focal aware seizures (formerly simple partial seizures): A subtype where consciousness is not impaired during the seizure.
- Focal impaired awareness seizures (formerly complex partial seizures): A subtype where consciousness is altered or lost during the seizure.
- The term is often used in clinical and research contexts to discuss the epileptogenic zone—the specific area of the brain where seizures begin.
Variants and Related Words
- Focal seizure (n): The individual seizure event itself, which is the manifestation of focal epilepsy.
- She experienced a focal seizure affecting her right hand.
- Localization-related epilepsy: A largely synonymous term.
- Partial epilepsy: An older, now less preferred term for focal epilepsy.
Synonyms
- Localization-related epilepsy
- Partial epilepsy (dated but still encountered)
Antonyms
- Generalized epilepsy
- Primary generalized epilepsy
Noun
-
epilepsy in which the attacks begins with an isolated disturbance of cerebral function (as a twitching of a limb or an illusory sensation or a mental disturbance)
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