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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 ...
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 .
The medical term neurasthenia is translated as Chinese shenjing shuairuo (simplified Chinese: 神经衰弱; traditional Chinese: 神經衰弱; pinyin: shénjīng shuāiruò; Cantonese Yale: sàhngīng sēuiyeuhk) or Japanese shinkei-suijaku (神経衰弱), both of which also translate the common term nervous breakdown.
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.
Fibromyalgia is a medical syndrome that causes chronic widespread pain, accompanied by fatigue, awakening unrefreshed, and cognitive symptoms. Other symptoms can include headaches, lower abdominal pain or cramps, and depression. [9] People with fibromyalgia can also experience insomnia [10] and general hypersensitivity.
The term “postviral syndrome” was classified to code 780.7, Malaise and fatigue, in Chapter 16, Symptoms, signs and ill-defined conditions. [58] 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".
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Directed attention fatigue (DAF) is a neuro-psychological phenomenon that results from overuse of the brain's inhibitory attention mechanisms, which handle incoming distractions while maintaining focus on a specific task. The greatest threat to a given focus of attention is competition from other stimuli that can cause a shift in focus.