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Related Concept Videos

Epilepsy and Seizures: Overview01:24

Epilepsy and Seizures: Overview

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...
Hormonal Regulation of the Menstrual Cycle01:22

Hormonal Regulation of the Menstrual Cycle

The ovarian cycle regulates endometrial changes throughout a single menstrual cycle via the coordinated action of gonadotrophin-releasing hormone (GnRH) and gonadotrophins.
At puberty, GnRH begins a pulsatile release pattern, which triggers the anterior pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). The frequency and amplitude of GnRH pulses vary across the menstrual cycle, with faster pulses favoring LH release and slower pulses favoring FSH release.
Epilepsy ll: Types01:22

Epilepsy ll: Types

Recurrent seizures, stemming from abnormal electrical activity in the brain, are the defining characteristic of epilepsy, a chronic neurological condition. Because seizure features vary greatly, epilepsy is classified using two systems: by seizure type and by epilepsy syndromes. These classifications enable clinicians to describe seizure patterns and select suitable treatment strategies.I. Classification by Seizure Type1. Focal EpilepsyFocal epilepsy begins in one hemisphere of the brain.
Hormonal Control of the Ovarian Cycle01:30

Hormonal Control of the Ovarian Cycle

The ovarian cycle is meticulously regulated by the hypothalamic-pituitary-gonadal axis. This cycle orchestrates the release of a mature oocyte, essential for reproduction.
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle.  At puberty, GnRH secretion increases in both frequency and...
Major Hormones and Their Functions01:27

Major Hormones and Their Functions

Hormones, the biochemical messengers produced by endocrine glands, are pivotal in regulating bodily functions and maintaining homeostasis. Each hormone's balance is crucial; imbalances can lead to significant physiological disruptions. Major hormones include oxytocin, cortisol, epinephrine, estrogen, testosterone, thyroxine, growth hormone, insulin, and glucagon.
Oxytocin, produced in the hypothalamus and released by the pituitary gland, plays a role in social bonding, childbirth, and lactation.
Seizures: Classification01:13

Seizures: Classification

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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Related Experiment Video

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Manipulation of Epileptiform Electrocorticograms (ECoGs) and Sleep in Rats and Mice by Acupuncture
09:06

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Catamenial epilepsy: hormonal aspects.

Alberto Verrotti1, Melissa Laus, Giangennaro Coppola

  • 1Department of Pediatrics, University of Chieti, Chieti, Italy. averrott@unich.it

Gynecological Endocrinology : the Official Journal of the International Society of Gynecological Endocrinology
|June 4, 2010
PubMed
Summary
This summary is machine-generated.

Catamenial epilepsy involves cyclical seizure worsening linked to menstrual cycle phases. Hormonal shifts, particularly estrogen and progesterone, and antiepileptic drug level changes contribute to seizure exacerbations.

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09:07

Electroconvulsive Seizures in Rats and Fractionation of Their Hippocampi to Examine Seizure-induced Changes in Postsynaptic Density Proteins

Published on: August 15, 2017

Area of Science:

  • Neurology
  • Endocrinology
  • Pharmacology

Background:

  • Catamenial epilepsy is characterized by seizure exacerbations tied to specific menstrual cycle phases.
  • Three patterns of exacerbation exist: perimenstrual, periovulatory, and during the luteal phase of anovulatory cycles.

Purpose of the Study:

  • To review the understanding of catamenial epilepsy, including its patterns, underlying mechanisms, and management strategies.

Main Methods:

  • Literature review of studies on catamenial epilepsy.
  • Analysis of hormonal influences (estrogen, progesterone) on seizure activity.
  • Consideration of antiepileptic drug pharmacokinetics during the menstrual cycle.

Main Results:

  • Estrogen acts as a proconvulsant, while progesterone has anticonvulsant properties, influencing seizure thresholds cyclically.
  • Fluctuations in antiepileptic drug concentrations throughout the menstrual cycle can increase seizure susceptibility.
  • Specific patterns of seizure exacerbation correlate with hormonal changes in ovulatory and anovulatory cycles.

Conclusions:

  • Catamenial epilepsy is driven by cyclical hormonal fluctuations and potential changes in antiepileptic drug efficacy.
  • Understanding these patterns is crucial for developing targeted treatment approaches.
  • Management strategies for catamenial epilepsy require consideration of the menstrual cycle.