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Related Concept Videos

Narcolepsy01:07

Narcolepsy

784
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

3.3K
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:
3.3K
Autoimmune Disorders01:29

Autoimmune Disorders

2.2K
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...
2.2K
Myasthenia Gravis: Overview and Treatment01:20

Myasthenia Gravis: Overview and Treatment

3.5K
Myasthenia gravis is a neuromuscular transmission disorder characterized by weakness and increased fatigability of skeletal muscles. It is an autoimmune disease affecting approximately one in 2000 people, where antibodies against the α1 subunit of nicotinic acetylcholine receptors are produced.
These antibodies interfere with the function of the nicotinic receptors in three ways: by binding to the receptor and disrupting acetylcholine binding; by causing cross-linking of receptors which...
3.5K
Chemical Synapses01:26

Chemical Synapses

12.5K
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
12.5K
Chemical Synapses01:26

Chemical Synapses

9.0K
Chemical synapses are specialized sites between two neurons or between a neuron and a non-neuronal cell like a muscle, glandular or sensory cell.
Because chemical synapses depend on the release of neurotransmitter molecules from synaptic vesicles to pass on their signal, there is an approximately one millisecond delay between when the axon potential reaches the presynaptic terminal and when the neurotransmitter leads to opening of postsynaptic ion channels. Additionally, this signaling is...
9.0K

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Related Experiment Video

Updated: Apr 5, 2026

Induction and Diverse Assessment Indicators of Experimental Autoimmune Encephalomyelitis
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Published on: September 9, 2022

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[Narcolepsy as an autoimmune disease].

Tomi Sarkanen, Outi Vaarala, Ilkka Julkunen

    Duodecim; Laaketieteellinen Aikakauskirja
    |August 7, 2015
    PubMed
    Summary

    Narcolepsy, a central sleep disorder, may be triggered by infections or external factors. The H1N1 vaccine, particularly with the AS03 adjuvant, was linked to increased narcolepsy incidence in children and adolescents.

    Area of Science:

    • Neurology
    • Immunology
    • Sleep Medicine

    Context:

    • Narcolepsy is a central nervous system disorder affecting sleep-wake cycles.
    • Type 1 narcolepsy is characterized by hypocretin deficiency.
    • The etiology of Type 2 narcolepsy remains less understood.

    Purpose:

    • To explore potential triggers for narcolepsy.
    • To investigate the association between the H1N1 vaccine and narcolepsy incidence.
    • To examine the role of vaccine components, including adjuvants, in autoimmune responses.

    Summary:

    • Narcolepsy is a sleep disorder with central origins, with hypocretin deficiency being key in Type 1.
    • Infections and external factors are suspected triggers.
    • An increased incidence of narcolepsy, especially in children and adolescents, was observed following the H1N1 vaccination campaign using the AS03 adjuvant-boosted vaccine.

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  • The pandemic vaccine's virus component is considered a primary factor, with the adjuvant potentially amplifying autoimmune responses.

    • Impact:

    • Highlights the potential link between vaccination and narcolepsy, particularly in younger populations.
    • Suggests a need for further research into vaccine components and autoimmune triggers for narcolepsy.
    • Informs public health strategies regarding vaccine safety and narcolepsy surveillance.