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Definition. 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 ...
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. [23] Many individuals with ME/CFS object to the term chronic fatigue syndrome. They consider ...
Muscle weakness. Muscle weakness is a lack of muscle strength. Its causes are many and can be divided into conditions that have either true or perceived muscle weakness. True muscle weakness is a primary symptom of a variety of skeletal muscle diseases, including muscular dystrophy and inflammatory myopathy. It occurs in neuromuscular junction ...
Chronic fatigue syndrome (CFS) is a condition that causes long-term fatigue that often doesn't get better with rest. Researchers are still trying to better understand the exact cause of CFS, but ...
Clinical descriptions of ME/CFS. Clinical descriptions of ME/CFS ( myalgic encephalomyelitis/chronic fatigue syndrome) vary. Different groups have produced sets of diagnostic criteria that share many similarities. The biggest differences between criteria are whether post-exertional malaise (PEM) is required, and the number of symptoms needed.
Central nervous system fatigue is a key component in preventing peripheral muscle injury. [ 28] The brain has numerous receptors, such as osmoreceptors, to track dehydration, nutrition, and body temperature. With that information as well as peripheral muscle fatigue information, the brain can reduce the quantity of motor commands sent from the ...
Weakness is a symptom of many different medical conditions. [ 1] The causes are many and can be divided into conditions that have true or perceived muscle weakness. True muscle weakness is a primary symptom of a variety of skeletal muscle diseases, including muscular dystrophy and inflammatory myopathy. It occurs in neuromuscular junction ...
Muscle fatigue is when muscles that were initially generating a normal amount of force, then experience a declining ability to generate force. It can be a result of vigorous exercise, but abnormal fatigue may be caused by barriers to or interference with the different stages of muscle contraction. There are two main causes of muscle fatigue ...