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Related Concept Videos

Seizures: Classification01:13

Seizures: Classification

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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:
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Epilepsy and Seizures: Overview01:24

Epilepsy and Seizures: Overview

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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...
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Electroconvulsive Therapy01:30

Electroconvulsive Therapy

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Electroconvulsive therapy (ECT), or shock therapy, remains a critical biomedical intervention for severe, treatment-resistant depression. While its origins can be traced back to Hippocrates' observations that malaria-induced convulsions alleviated mental illness, modern ECT has evolved significantly from its earlier, more primitive applications. First introduced in 1938 by Ugo Cerletti and his colleagues, ECT involves inducing controlled seizures using electrical currents. In its early...
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Antiepileptic Drugs: Potassium Channel Activators01:20

Antiepileptic Drugs: Potassium Channel Activators

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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...
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Antiepileptic Drugs: GABAergic Pathway Potentiators01:18

Antiepileptic Drugs: GABAergic Pathway Potentiators

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γ-aminobutyric acid or GABA, plays a pivotal role as an inhibitory neurotransmitter in the brain. GABA pathway potentiators, also known as GABAergic drugs, are a class of pharmaceutical agents designed to enhance the functioning of the GABAergic system. These medications primarily treat epilepsy, a neurological disorder characterized by recurrent seizures.
The key GABA pathway potentiators used in epilepsy management are as follows.
Benzodiazepines are a well-known class of drugs used for...
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Antiepileptic Drugs: Glutamate Antagonists01:14

Antiepileptic Drugs: Glutamate Antagonists

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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...
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Related Experiment Video

Updated: Mar 22, 2026

Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus
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Methods for ECG Evaluation of Indicators of Cardiac Risk, and Susceptibility to Aconitine-induced Arrhythmias in Rats Following Status Epilepticus

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[Nonconvulsive Status Epilepticus].

Masahiro Mizobuchi1

  • 1Epilepsy Center, Department of Neurology, Nakamura Memorial Hospital.

Brain and Nerve = Shinkei Kenkyu No Shinpo
|April 9, 2016
PubMed
Summary

Nonconvulsive status epilepticus (NCSE) presents without major motor seizures. Early diagnosis using continuous EEG or neuroimaging is crucial for effective treatment of this condition.

Area of Science:

  • Neurology
  • Epileptology

Background:

  • Nonconvulsive status epilepticus (NCSE) is a subtype of status epilepticus characterized by a lack of prominent motor symptoms.
  • NCSE accounts for nearly half of all status epilepticus cases, with an estimated annual prevalence of 10-20 per 100,000 individuals.
  • Various forms of NCSE exist, including absence SE, complex partial SE, late-onset de novo NCSE, and NCSE secondary to acute brain injury or post-convulsive states.

Observation:

  • Diagnosis of NCSE necessitates electroencephalography (EEG).
  • Continuous EEG (cEEG) monitoring for at least 24 hours is recommended due to the fluctuating nature of cognitive disturbances in NCSE.
  • Neuroimaging, including MRI with arterial spin labeled sequences and SPECT, can reveal hyperperfusion in focal onset NCSE.

Findings:

  • NCSE is often underdiagnosed due to its subtle presentation.

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  • Diagnostic challenges arise from fluctuating cognitive symptoms.
  • Advanced neuroimaging aids in identifying focal onset NCSE.

    • Implications:

    • Prompt evaluation with cEEG or blood flow imaging is vital for patients with unexplained cognitive disturbances or confusion.
    • Timely diagnosis and treatment of NCSE can prevent long-term neurological sequelae.
    • Increased awareness and utilization of diagnostic tools can improve patient outcomes for NCSE.