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Chronic fatigue with a known cause is twice as common as idiopathic chronic fatigue. [6] Idiopathic chronic fatigue affects between 2.4% and 6.42% of patients, [26] with females more likely to be affected than men. [1] Age at onset is typically over 50 years of age. [13]
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]
Lethargy is a state of tiredness, sleepiness, weariness, fatigue, sluggishness, or lack of energy. It can be accompanied by depression , decreased motivation, or apathy . Lethargy can be a normal response to inadequate sleep, overexertion, overworking, stress, lack of exercise, improper nutrition, drug abuse, boredom , or a symptom of an ...
People suffered from "chronic or recurrent fatigue", among a large number of other symptoms. [1]: 28–29 The initial link between elevated antibodies and the Epstein–Barr virus led to the name "chronic Epstein–Barr virus syndrome". The CDC renamed it chronic fatigue syndrome (CFS), as a viral cause could not be confirmed in studies.
An adult who is compelled to nap repeatedly during the day may have excessive daytime sleepiness (EDS); however, it is important to distinguish between occasional daytime sleepiness and EDS, which is chronic. A number of tools for screening for EDS have been developed.
Central nervous system fatigue, or central fatigue, is a form of fatigue that is associated with changes in the synaptic concentration of neurotransmitters within the central nervous system (CNS; including the brain and spinal cord) which affects exercise performance and muscle function and cannot be explained by peripheral factors that affect muscle function.
Somnolence (alternatively sleepiness or drowsiness) is a state of strong desire for sleep, or sleeping for unusually long periods (compare hypersomnia).It has distinct meanings and causes.
Fatigue can be both physical and mental. Physical fatigue is the inability to continue functioning at the level of one's normal abilities; a person with physical fatigue cannot lift as heavy a box or walk as far as he could if not fatigued. [3] [4] [5] Mental fatigue, on the other hand, rather manifests in sleepiness or slowness. A person with ...