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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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Seizures: Classification01:13

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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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Disorders of the Nervous Tissue01:28

Disorders of the Nervous Tissue

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Nervous tissue is a vital component of the human body's communication system, enabling us to perceive and respond to stimuli. However, like all other tissues, it is vulnerable to disorders and diseases that can significantly impact our neurological functioning.
Homeostatic Imbalances:
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Psychosis: Pathophysiology of Schizophrenia and Other Psychotic Disorders01:27

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Schizophrenia is a neurodevelopmental disorder whose origins are rooted in complex genetic components. Despite our burgeoning understanding, the pathophysiology of this disorder remains incompletely deciphered.
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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.
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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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Updated: Dec 15, 2025

Network Analysis of Foramen Ovale Electrode Recordings in Drug-resistant Temporal Lobe Epilepsy Patients
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Network Dysfunction in Comorbid Psychiatric Illnesses and Epilepsy.

Phillip L W Colmers1, Jamie Maguire1

  • 1Neuroscience Department, Tufts University School of Medicine, Boston, MA, USA.

Epilepsy Currents
|July 7, 2020
PubMed
Summary
This summary is machine-generated.

Epilepsy and psychiatric disorders involve brain state transitions. Aberrant network activity beyond seizures contributes to cognitive issues and comorbidities in epilepsy, driven by mechanisms like interneuron loss.

Keywords:
HPA axisamygdalaepilepsynetworkspsychiatric comorbidities

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A Multimodal Imaging- and Stimulation-based Method of Evaluating Connectivity-related Brain Excitability in Patients with Epilepsy
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Area of Science:

  • Neuroscience
  • Psychiatry
  • Epileptology

Background:

  • Epilepsy and psychiatric illnesses exhibit episodic patterns, suggesting dynamic brain state shifts.
  • Ictal events are clear examples of state transitions in epilepsy, but subtle network changes may underlie psychiatric comorbidities.

Purpose of the Study:

  • To review evidence linking aberrant brain network activity in epilepsy to cognitive impairments and psychiatric comorbidities.
  • To explore potential mechanisms, such as interneuron loss and HPA axis dysfunction, mediating these comorbidities.

Main Methods:

  • Literature review focusing on network dysfunction in epilepsy.
  • Analysis of studies examining cognitive and psychiatric symptoms in epilepsy patients.
  • Discussion of neurobiological mechanisms implicated in epilepsy comorbidities.

Main Results:

  • Evidence supports aberrant network activity in epilepsy contributing to cognitive deficits.
  • Subtle, non-ictal network changes are proposed to play a role in psychiatric comorbidities.
  • Interneuron loss and hypothalamic-pituitary-adrenal axis dysfunction are identified as potential mediating mechanisms.

Conclusions:

  • Understanding epilepsy requires considering network dysfunction beyond ictal events.
  • Aberrant brain network activity is a key factor in the cognitive and psychiatric symptoms associated with epilepsy.
  • Further research into network mechanisms can elucidate and potentially treat epilepsy comorbidities.