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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.
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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.
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Reflex Activity01:08

Reflex Activity

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A reflex activity is an automatic, involuntary response to specific stimuli. It is a part of our survival mechanism, designed to protect us from potential harm. For example, when a bright light suddenly shines into our eyes, we instinctively close them or look away. This is a simple reflex activity orchestrated by the nervous system without conscious thought or effort.
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Antiepileptic Drugs: Modulators of Neurotransmitter Release Mediated by SV2A Protein01:20

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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.
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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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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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Related Experiment Video

Updated: Apr 3, 2026

Manipulation of Epileptiform Electrocorticograms ECoGs and Sleep in Rats and Mice by Acupuncture
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Autonomic function in reflex and non-reflex epilepsy--an exploratory study.

A Meghana1, S J Sriranjini2, T Sathyaprabha1

  • 1Department of Neurophysiology, National Institute of Mental Health and Neuroscience (NIMHANS), Bangalore, India.

Acta Neurologica Scandinavica
|September 16, 2015
PubMed
Summary
This summary is machine-generated.

Hot water epilepsy (HWE) significantly alters cardiac autonomic regulation, especially with spontaneous seizures. Carbamazepine (CBZ) did not affect these functions, but drug-naïve patients showed more severe vagal tone impairment.

Keywords:
autonomic dysfunctioncomplex partial seizurehot water epilepsy

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Area of Science:

  • Neurology
  • Cardiology
  • Autonomic Neuroscience

Background:

  • Seizures impact the Central Autonomic Network (CAN), causing diverse autonomic symptoms.
  • Hot water epilepsy (HWE) is a specific epilepsy type with unique triggers.
  • Understanding neuro-cardiac autonomic regulation is crucial for managing epilepsy-related comorbidities.

Purpose of the Study:

  • To characterize neuro-cardiac autonomic regulation in hot water epilepsy (HWE).
  • To compare autonomic function in HWE with and without spontaneous seizures.
  • To analyze the effect of Carbamazepine (CBZ) on autonomic regulation in HWE.

Main Methods:

  • Recruited 70 HWE patients (42 drug-naïve, 28 on CBZ) and 40 patients with spontaneous complex partial seizures (CPS) on CBZ.
  • Included 50 healthy volunteers as controls.
  • Performed cardiac autonomic function tests: Heart Rate Variability (HRV), Blood Pressure Variability (BPV), and baroreflex sensitivity (BRS).

Main Results:

  • All epilepsy subgroups showed significant autonomic dysfunction compared to controls.
  • HWE patients exhibited reduced parasympathetic activity.
  • HWE with spontaneous seizures showed impaired sympathovagal balance and altered BRS compared to HWE only.
  • Spontaneous CPS groups had reduced parasympathetic and sympathetic activities compared to HWE groups.

Conclusions:

  • HWE alters cardiovascular reflexes and autonomic regulation, with greater impact in spontaneous seizures.
  • Drug-naïve HWE patients had more severe vagal tone impairment than those on CBZ.
  • CBZ did not significantly alter cardiac autonomic functions in HWE or spontaneous CPS.