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Related Concept Videos

Narcolepsy01:07

Narcolepsy

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Narcolepsy is a chronic sleep disorder characterized by pervasive, uncontrolled sleepiness and other sleep disturbances. One of its hallmark symptoms is an abrupt transition to REM sleep upon falling asleep, which causes symptoms typically associated with this phase to occur unexpectedly during wakefulness. These include the following symptoms, which typically last from a minute or two to half an hour.
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Sleep-Wake Cycles01:24

Sleep-Wake Cycles

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Sleep is an essential physiological process vital to maintaining overall well-being. The reticular activating system (RAS), a network of neurons in the brainstem, regulates wakefulness and sleep. While it may seem passive, sleep consists of distinct cycles, each with its unique characteristics and functions. Two key sleep phases are non-rapid eye movement (NREM) and  rapid eye movement (REM).
NREM Sleep
NREM sleep comprises four progressive stages that seamlessly merge:
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Myasthenia Gravis ll: Pathophysiology01:22

Myasthenia Gravis ll: Pathophysiology

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The disease process of myasthenia gravis begins at the neuromuscular junction, where antibodies attack key proteins needed for muscle activation. This immune reaction weakens signal transmission, leading to the characteristic muscle fatigue and weakness that define the condition.Immune-Mediated DamageIn most individuals, antibodies target acetylcholine receptors (AChRs) on the postsynaptic membrane of muscle cells. By blocking acetylcholine binding, these antibodies prevent the nerve signal...
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REM Sleep Behavior Disorder01:15

REM Sleep Behavior Disorder

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REM Sleep Behavior Disorder (RBD) is a sleep disorder characterized by the absence of muscle paralysis that normally occurs during the REM phase of sleep. This absence allows individuals to physically act out their dreams, which are often vivid and disturbing. Common behaviors exhibited during episodes include kicking, punching, and yelling. These actions can be dangerous, potentially leading to injuries for the person with RBD or their bed partner.
RBD is significantly associated with...
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Graves Disease II: Pathophysiology01:24

Graves Disease II: Pathophysiology

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Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor,...
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Autoimmune Disorders01:29

Autoimmune Disorders

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Autoimmune diseases are a group of disorders in which the body's immune system mistakenly attacks its own cells, tissues, and organs. This results from an overactive immune response against substances and tissues normally present in the body. Let's delve into the concept and mechanism of autoimmune diseases from an immune system point of view, explore different causes and examples of such diseases, and discuss potential solutions.
Concept and Mechanism of Autoimmune Diseases
The immune...
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Is narcolepsy a classical autoimmune disease?

María-Teresa Arango1, Shaye Kivity2, Yehuda Shoenfeld3

  • 1Zabludowicz Center for Autoimmune Diseases, Sheba Medical Center, Tel-Hashomer, Affiliated to Sackler Faculty of Medicine, Tel Aviv University, Israel; Center for Autoimmune Diseases Research - CREA, Universidad del Rosario, Bogota, Colombia; Doctoral Program in Biomedical Sciences, Universidad del Rosario, Bogota, Colombia.

Pharmacological Research
|December 3, 2014
PubMed
Summary
This summary is machine-generated.

Narcolepsy, a neurological disorder causing sleepiness, is linked to an autoimmune loss of orexin neurons. This review explores narcolepsy pathogenesis and its potential connection to H1N1 vaccines.

Keywords:
ASIA syndromeAdjuvantAutoimmune diseasesH1N1InfectionsNarcolepsy

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Area of Science:

  • Neurology
  • Immunology
  • Vaccinology

Background:

  • Narcolepsy is a neurological disorder marked by excessive daytime sleepiness.
  • It results from the loss of orexin-producing neurons in the lateral hypothalamus.
  • Evidence suggests an autoimmune process underlies this specific neuronal loss.

Purpose of the Study:

  • To review recent findings on narcolepsy pathogenesis.
  • To investigate the relationship between narcolepsy and H1N1 vaccination campaigns.

Main Methods:

  • Literature review of narcolepsy research.
  • Analysis of studies linking narcolepsy occurrence to vaccination.

Main Results:

  • Narcolepsy is strongly associated with HLA-DQB1*06:02 and environmental factors.
  • Recent studies highlight a potential association between narcolepsy and H1N1 pandemic vaccination.

Conclusions:

  • The autoimmune hypothesis for narcolepsy is supported by genetic and environmental evidence.
  • Further research is needed to understand the complex relationship between vaccines and narcolepsy.