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  2. Central nervous system fatigue - Wikipedia

    en.wikipedia.org/wiki/Central_Nervous_System_Fatigue

    In the brain, serotonin is a neurotransmitter and regulates arousal, behavior, sleep, and mood, among other things. [9] During prolonged exercise where central nervous system fatigue is present, serotonin levels in the brain are higher than normal physiological conditions; these higher levels can increase perceptions of effort and peripheral muscle fatigue. [9]

  3. Post-exertional malaise - Wikipedia

    en.wikipedia.org/wiki/Post-exertional_malaise

    It is the hallmark symptom of myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS) and common in long COVID and fibromyalgia. [3] [1] PEM is often severe enough to be disabling, and is triggered by ordinary activities that healthy people tolerate. Typically, it begins 12–48 hours after the activity that triggers it, and lasts for days ...

  4. Synaptic fatigue - Wikipedia

    en.wikipedia.org/wiki/Synaptic_fatigue

    Synaptic Fatigue has not been shown to directly cause or result in a central nervous system pathology, although the degrees at which it is activated in cells has been studied as result of particular pathologies and diseases. Long-term changes in a neuron or synapse, resulting in a permanent change in a neuron's excitatory properties can cause ...

  5. Fatigue - Wikipedia

    en.wikipedia.org/wiki/Fatigue

    Fatigue is a state of tiredness (which is not sleepiness), exhaustion [1] or loss of energy. [2] [3]Fatigue (in the medical sense) is sometimes associated with medical conditions including autoimmune disease, organ failure, chronic pain conditions, mood disorders, heart disease, infectious diseases, and post-infectious-disease states. [4]

  6. Myalgic encephalomyelitis/chronic fatigue syndrome - Wikipedia

    en.wikipedia.org/.../chronic_fatigue_syndrome

    The term post-infectious fatigue syndrome was initially proposed as a subset of "chronic fatigue syndrome" with a documented triggering infection, but might also be used as a synonym of ME/CFS or as a broader set of fatigue conditions after infection. [26] Many individuals with ME/CFS object to the term chronic fatigue syndrome. They consider ...

  7. Bradyphrenia - Wikipedia

    en.wikipedia.org/wiki/Bradyphrenia

    Bradyphrenia is the slowness of thought common to many disorders of the brain. [1] Disorders characterized by bradyphrenia include Parkinson's disease and forms of schizophrenia consequently causing a delayed response and fatigue. [2]

  8. Cerebral edema - Wikipedia

    en.wikipedia.org/wiki/Cerebral_edema

    The exact pathophysiology, or cause, of the syndrome is still debated but is hypothesized to be related to the disruption of the blood-brain barrier. [12] The syndrome features acute neurological symptoms and reversible subcortical vasogenic edema predominantly involving the parieto-occipital areas on MR imaging. [28]

  9. Cholinergic crisis - Wikipedia

    en.wikipedia.org/wiki/Cholinergic_crisis

    Some elements of the cholinergic crisis can be reversed with antimuscarinic drugs like atropine or diphenhydramine, but the most dangerous effect — respiratory depression, cannot. [ 6 ] The neuromuscular junction, where the brain communicates with muscles (like the diaphragm , the main breathing muscle), works by acetylcholine activating ...

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