What is presurgical evaluation of epilepsy?
An overview of the following six cortical zones that have been defined in the presurgical evaluation of candidates for epilepsy surgery is given: the symptomatogenic zone; the irritative zone; the seizure onset zone; the epileptogenic lesion; the epileptogenic zone; and the eloquent cortex.
What is the epileptogenic zone?
The epileptogenic zone is defined as the region of the brain from which the patient’s habitual seizures arise.
What is seizure onset zone?
The seizure onset zone is the area of the cortex from which clinical seizures are (actually) generated, as opposed to the epileptogenic zone, which is the area of the cortex that is indispensable for the generation of epileptic seizures (see also the section `The epileptogenic zone’, below).
What is a WADA test with epilepsy?
Juhn Wada. The Wada test looks at language and memory on one side of the brain at a time. Language (speech) is controlled by one side of the brain (in most people, the left side). The Wada will help doctors find out which side controls language in your brain. Memory can be controlled by both sides of the brain.
What is an EEG test for epilepsy?
EEG results show changes in brain activity that may be useful in diagnosing brain conditions, especially epilepsy and other seizure disorders. An electroencephalogram (EEG) is a test that detects electrical activity in your brain using small, metal discs (electrodes) attached to your scalp.
What is an Epileptogenic?
According to the new terminology, epileptogenesis refers to the development and extension of tissue capable of generating SRSs, resulting in (1) development of an epileptic condition, and/or (2) progression of the epilepsy after it is established.
What is Epileptogenic focus?
a discrete area of the brain in which originate the electrical discharges that give rise to seizure activity.
Which are manifestations of a tonic clonic seizure?
A tonic-clonic seizure usually begins on both sides of the brain, but can start in one side and spread to the whole brain. A person loses consciousness, muscles stiffen, and jerking movements are seen. These types of seizures usually last 1 to 3 minutes and take longer for a person to recover.
What does a Wada test do?
The Wada test can help a physician evaluate how important each side of the brain is with respect to language and memory functions. Data from the Wada test help the epilepsy team determine the approach most likely to address seizures while preserving areas of the brain associated with speech and memory.
What is Wada test explain its procedure and significant?
The Wada test looks at language and memory on one side of the brain at a time. Language (speech) is controlled by one side of the brain (in most people, the left side). The Wada will help doctors find out which side controls language in your brain. Memory can be controlled by both sides of the brain.
What does an EEG tell you?
An EEG is a test that detects abnormalities in your brain waves, or in the electrical activity of your brain. During the procedure, electrodes consisting of small metal discs with thin wires are pasted onto your scalp. The electrodes detect tiny electrical charges that result from the activity of your brain cells.
Does abnormal EEG mean epilepsy?
The EEG cannot be used to tell if a person is lying. A normal EEG means I do not have epilepsy. Many patients with epilepsy have a normal EEG between attacks. An abnormal EEG means I have epilepsy.