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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]
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.
Another theory suggests that the stress brought on by sleep deprivation affects memory consolidation by changing the concentration of corticosteroids in the body. [citation needed] This was simulated in one study by elevating the concentration of glucocorticoids during early sleep stages. The observed effects on memory retention the next day ...
Management of ME/CFS (myalgic encephalomyelitis/chronic fatigue syndrome) focuses on symptoms management, as no treatments that address the root cause of the illness are available. [ 1 ] : 29 Pacing, or regulating one's activities to avoid triggering worse symptoms, is the most common management strategy for post-exertional malaise .
This review also compared alternative theories to attention restoration theory, including the strength model of self-regulation (SMSR), the attention-resource model, and the stress recovery theory. A number of studies have been performed that specifically focus on directed attention fatigue experienced by cancer patients.
Sleep deprivation causes drowsiness, which can affect students in higher education. Drowsiness can affect students in their classes and poses a risk for those who commute by car to their college campuses. Many students commute by car to their classes from their homes; at the Ohio State University, close to 30% of students commute.
There is likely a connection between stress and illness. [57] Theories of a proposed stress–illness link suggest that both acute and chronic stress can cause illness, and studies have found such a link. [58] According to these theories, both kinds of stress can lead to changes in behavior and in physiology.
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 ...