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Related Concept Videos

Epilepsy and Seizures: Overview01:24

Epilepsy and Seizures: Overview

469
Epilepsy is a chronic neurological disease marked by recurrent, unpredictable seizures. These seizures are caused by abnormal electrical discharges in the brain, leading to behavior, sensation, or consciousness alterations. They can also cause transient impairment of awareness, interfering with daily activities.
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
469
Seizures: Classification01:13

Seizures: Classification

793
Epilepsy is primarily characterized by unpredictable seizures, either provoked by an identifiable factor, such as injury or illness, or unprovoked, occurring spontaneously without apparent cause.
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
793
Antiepileptic Drugs: Glutamate Antagonists01:14

Antiepileptic Drugs: Glutamate Antagonists

607
Glutamate is a fundamental neurotransmitter in the central nervous system, playing a vital role in neuronal communication and various cognitive processes. Glutamate stands as the principal excitatory neurotransmitter in the brain. Its presence is crucial for the communication between neurons, underpinning essential processes such as synaptic transmission, neuronal excitability, and plasticity. These functions are vital for higher-order cognitive processes, including learning and memory. The...
607

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Electrophoretic Delivery of γ-aminobutyric Acid GABA into Epileptic Focus Prevents Seizures in Mice
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Localisation in focal epilepsy: a practical guide.

Fahmida A Chowdhury1,2, Rui Silva3, Benjamin Whatley3,4

  • 1Department of Epilepsy, National Hospital for Neurology and Neurosurgery, London, UK fahmidaamin.chowdhury@nhs.net.

Practical Neurology
|August 18, 2021
PubMed
Summary
This summary is machine-generated.

Understanding epileptic seizure semiology is key for diagnosing focal epilepsies and identifying the seizure onset zone. This insight is crucial for presurgical epilepsy assessment and avoiding localization pitfalls.

Keywords:
clinicalepilepsyneurophysiolsurgery

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Area of Science:

  • Neurology
  • Epileptology
  • Neuroscience

Background:

  • Epileptic seizure semiology reflects brain dysfunction, indicating the symptomatogenic zone.
  • Understanding seizure manifestations is vital for accurate diagnosis of paroxysmal events.
  • Focal epilepsies require precise localization of the seizure onset zone.

Purpose of the Study:

  • To review the current literature on seizure localization in focal epilepsies.
  • To highlight the importance of semiology in identifying the seizure onset zone.
  • To discuss potential challenges and pitfalls in localizing seizures.

Main Methods:

  • Literature review of studies on focal epilepsy semiology and localization.
  • Analysis of illustrative case studies demonstrating seizure manifestations.
  • Discussion of diagnostic challenges and localization pitfalls.

Main Results:

  • Specific seizure semiologies offer insights into the location of the seizure onset zone.
  • Accurate localization is critical for effective presurgical epilepsy evaluation.
  • Familiarity with the spectrum of semiologies aids in correct diagnosis.

Conclusions:

  • Seizure semiology is a powerful tool for localizing the seizure onset zone in focal epilepsies.
  • Precise localization through semiology is essential for presurgical planning.
  • Awareness of potential pitfalls improves the accuracy of epilepsy localization.