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In the brain, serotonin is a neurotransmitter and regulates arousal, behavior, sleep, and mood, among other things. [9] During prolonged exercise where central nervous system fatigue is present, serotonin levels in the brain are higher than normal physiological conditions; these higher levels can increase perceptions of effort and peripheral muscle fatigue. [9]
Despite its benefits, exercise is a challenge for patients with fibromyalgia, due to the chronic fatigue and pain they experience. [143] They may also feel that those who recommend or deliver exercise interventions do not fully understand the possible negative impact of exercise on fatigue and pain. [144]
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. [26] Many individuals with ME/CFS object to the term chronic fatigue syndrome. They consider ...
This is a list of major and frequently observed neurological disorders (e.g., Alzheimer's disease), symptoms (e.g., back pain), signs (e.g., aphasia) and syndromes (e.g., Aicardi syndrome). There is disagreement over the definitions and criteria used to delineate various disorders and whether some of these conditions should be classified as ...
Acute pain is mainly due to optic neuritis, trigeminal neuralgia, Lhermitte's sign or dysesthesias. [103] Subacute pain is usually secondary to the disease and can be a consequence of spending too much time in the same position, urinary retention, or infected skin ulcers. Chronic pain is common and harder to treat. [citation needed]
Huntington's disease is a degenerative neurological disorder that is inherited. Degeneration of neuronal cells occurs throughout the brain, especially in the striatum. There is a progressive decline that results in abnormal movements. [31] Statistics show that Huntington's disease may affect 10 per 100,000 people of Western European descent.
Parkinson's disease patient showing a typical flexed walking posture in advanced stage. Signs and symptoms of Parkinson's disease are varied. Parkinson's disease affects movement, producing motor symptoms. [1] Non-motor symptoms, which include dysautonomia, cognitive and neurobehavioral problems, and sensory and sleep difficulties, are also ...
Signs and symptoms are also applied to physiological states outside the context of disease, as for example when referring to the signs and symptoms of pregnancy, or the symptoms of dehydration. Sometimes a disease may be present without showing any signs or symptoms when it is known as being asymptomatic. [13]