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Related Concept Videos

Epilepsy and Seizures: Overview01:24

Epilepsy and Seizures: Overview

234
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...
234
Seizures: Classification01:13

Seizures: Classification

484
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:
484
Antiepileptic Drugs: Sodium Channel Blockers01:08

Antiepileptic Drugs: Sodium Channel Blockers

723
Antiepileptic drugs are specialized medications that prevent seizures in individuals diagnosed with epilepsy. These drugs primarily function by blocking the movement of sodium ions through channels in the neuronal membrane, inhibiting the repetitive firing of action potentials often associated with seizures.
Sodium channel blockers modulate ion channels, particularly voltage-gated sodium channels. They block only sodium ion movement.
Among the most commonly prescribed antiepileptic drugs are...
723
Antiepileptic Drugs: Potassium Channel Activators01:20

Antiepileptic Drugs: Potassium Channel Activators

228
Ezocgabine or retigabine, an antiepileptic drug of remarkable efficacy, has revolutionized the management of seizures. It is a potassium channel activator, explicitly targeting the family of Q subtype potassium channels. It enhances the transmembrane potassium currents, regulating neuronal excitability. This action stabilizes the resting membrane potential, a pivotal factor in mitigating the hyperexcitability that characterizes epilepsy.
Ezogabine has gained approval as an adjunctive treatment...
228
Antiepileptic Drugs: Glutamate Antagonists01:14

Antiepileptic Drugs: Glutamate Antagonists

448
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...
448
Antiepileptic Drugs: Calcium Channel Blockers01:17

Antiepileptic Drugs: Calcium Channel Blockers

499
Calcium channel blockers, a class of antiepileptic drugs, regulate the flow of calcium ions within neurons.
Calcium channel blockers exert their antiepileptic effects by targeting T-type calcium channels, which are integral to transmitting nerve signals in the central nervous system. These channels allow the passage of calcium ions, which are vital for neuronal communication. By inhibiting T-type calcium channels, calcium channel blockers effectively reduce the release of neurotransmitters and...
499

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Related Experiment Video

Updated: Aug 3, 2025

Author Spotlight: Advancing Pediatric Epilepsy Surgery in Children Through Novel Biomarkers and Enhanced Localization
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[Symptomatic Epilepsy].

Masanori Saito1

  • 1Department of Psychiatry, Teikyo University Hospital, Mizonokuchi.

Brain and Nerve = Shinkei Kenkyu No Shinpo
|April 10, 2023
PubMed
Summary

This review explores the diverse causes of symptomatic epilepsy, from structural issues like stroke and tumors to infections, metabolic disorders, and autoimmune inflammation. Understanding these origins is key to diagnosing and managing epilepsy effectively.

Area of Science:

  • Neurology
  • Pathophysiology

Context:

  • Epilepsy is a complex neurological disorder with varied underlying causes.
  • Historically, understanding epilepsy has evolved from basic observation to detailed etiological classification.

Purpose:

  • To provide a comprehensive overview of the different etiologies of symptomatic epilepsy.
  • To categorize epilepsy causes, aiding in diagnosis and research.

Summary:

  • Structural causes include cerebrovascular diseases, neoplasms, neurodegenerative disorders, and traumatic brain injuries.
  • Infectious agents represent the most prevalent global etiology of epilepsy.
  • Metabolic and immune-mediated pathways, such as autoimmune encephalitis, are increasingly recognized as direct causes of epilepsy.

Impact:

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  • Facilitates a clearer understanding of epilepsy's multifactorial nature.
  • Supports the development of targeted diagnostic and therapeutic strategies for epilepsy subtypes.