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Related Concept Videos

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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Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein01:20

Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein

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Antiepileptic drugs, such as levetiracetam (Keppra) and brivaracetam (Briviact), have emerged as crucial tools in managing epilepsy. These medications exert their therapeutic effects by targeting the synaptic vesicle protein SV2A, a transmembrane glycoprotein primarily found in the brain.
SV2A is a transmembrane glycoprotein located predominantly in the brain, modulating the release of neurotransmitters for neuronal communication. Both levetiracetam and brivaracetam exhibit a high affinity for...
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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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Antiepileptic Drugs: Calcium Channel Blockers01:17

Antiepileptic Drugs: Calcium Channel Blockers

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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...
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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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Neural diffusivity and pre-emptive epileptic seizure intervention.

Erik D Fagerholm1, Chayanin Tangwiriyasakul2,3, Karl J Friston4

  • 1Department of Neuroimaging, King's College London, London, United Kingdom.

Plos Computational Biology
|December 1, 2020
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Summary
This summary is machine-generated.

Mathematical models can guide interventions for epilepsy. Reducing brain signal diffusivity via targeted stimulation can prevent seizures by stabilizing neural activity before they start.

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Network Analysis of Foramen Ovale Electrode Recordings in Drug-resistant Temporal Lobe Epilepsy Patients
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Area of Science:

  • Computational neuroscience
  • Mathematical modeling of brain dynamics
  • Epilepsy research

Background:

  • Epileptic seizures involve widespread, unstable neural activity.
  • Mathematical models of neuronal dynamics offer insights into brain stability and pathology.
  • In silico treatments are crucial for understanding brain function and dysfunction.

Purpose of the Study:

  • To generalize dynamic causal modeling to a Fokker-Planck formalism.
  • To investigate methods for stabilizing neural systems prone to epileptic seizures.
  • To demonstrate a novel stimulation strategy for pre-emptive seizure mitigation.

Main Methods:

  • Extended dynamic causal modeling to a Fokker-Planck formalism.
  • Utilized the Jacobian of the generalized state equation to analyze system stability.
  • Simulated external stimulation mirroring pathological activity in connected regions.
  • Validated the approach using functional neuroimaging data from epilepsy patients.

Main Results:

  • Demonstrated that reducing diffusivity can stabilize an unstable neural system.
  • Showed that external stimulation can effectively reduce diffusivity in epilepsy models.
  • Successfully suppressed pathological activity in a sub-network pre-seizure onset using the proposed stimulation method.
  • Validated the counter-intuitive, pre-emptive stimulation strategy in silico.

Conclusions:

  • External stimulation can stabilize neural dynamics and prevent epileptic seizures.
  • A pre-emptive stimulation strategy, mirroring pathological activity, shows promise for epilepsy treatment.
  • This approach could form the basis for non-invasive, real-time epilepsy intervention devices.