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Prolonged fatigue is fatigue that persists for more than a month, and chronic fatigue is fatigue that lasts at least six consecutive months, which may be caused by a physical or psychological illness, or may be idiopathic (no known cause). [1] Chronic fatigue with a known cause is twice as common as idiopathic chronic fatigue. [6]
Chronic fatigue, a long-term state of physical or mental exhaustion, a symptom of many chronic illnesses and of idiopathic chronic fatigue Myalgic encephalomyelitis/chronic fatigue syndrome , a discrete chronic medical condition characterized by post-exertional malaise , symptoms of profound intensity including fatigue, pain, and cognitive ...
Fatigue in a medical context is used to cover experiences of low energy that are not caused by normal life. [2] [3]A 2021 review proposed a definition for fatigue as a starting point for discussion: "A multi-dimensional phenomenon in which the biophysiological, cognitive, motivational and emotional state of the body is affected resulting in significant impairment of the individual's ability to ...
Chronic fatigue syndrome; Systemic vasculitis e.g. SLE, PAN; Sarcoidosis – a disease that mainly affects the lungs, brain, joints and eyes, found most often in young African-American women. Hypothyroidism – where the thyroid gland produces too little thyroid hormones. Diabetes mellitus – an imbalance in blood glucose (sugar) levels ...
Many names have been proposed for the illness. The most commonly used are chronic fatigue syndrome, myalgic encephalomyelitis, and the umbrella term myalgic encephalomyelitis/chronic fatigue syndrome (ME/CFS). Reaching consensus on a name has been challenging because the cause and pathology remain unknown.
The name Chronic Fatigue Syndrome has been attributed to the US Centers for Disease Control 1988 research case definition for the illness, "Chronic fatigue syndrome: a working case definition". [ 38 ] [ 40 ] Chronic Fatigue Syndrome (CFS) was added to ICD-9 after 1988 and listed under code 780.71 , Symptoms Signs and Ill-defined Conditions.
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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.