3 4 dihydroxyphenylacetic acid/trötthet

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Central fatigue induced by losartan involves brain serotonin and dopamine content.

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OBJECTIVE To investigate the influence of angiotensin II (Ang II) AT1 receptors blockade on central fatigue induced by brain content of serotonin (5-HT) and dopamine (DA) during exercise. METHODS Losartan (Los) was intracerebroventricularly injected in rats before running until fatigue (n = 6 per

Recovery from fatigue: changes in local brain 2-[18F]fluoro-2-deoxy-D-glucose utilization measured by autoradiography and in brain monoamine levels of rat.

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We recently established an animal model of fatigue in which rats were kept in a cage filled with water to a height of 1.5 cm for 5 days. In this way, after the fatigue session, they were returned to their home cage. Rats resting for 15 min or 2 h showed reduced 2-[18F]fluoro-2-deoxy-D-glucose uptake

Assessment of fatigue-related biochemical alterations in a rat swimming model under hypoxia.

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It is well known that exercise-induced fatigue is exacerbated following hypoxia exposure and may arise from central and/or peripheral mechanisms. To assess the relative contribution of peripheral and central factors to exercise-induced fatigue under hypoxia, a rat model of fatigue by a bout of

Neuroendocrine and substrate responses to altered brain 5-HT activity during prolonged exercise to fatigue.

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Pharmacological manipulation of brain serotonergic [5-hydroxytryptamine (5-HT)] activity affects run time to exhaustion in the rat. These effects may be mediated by neurochemical, hormonal, or substrate mechanisms. Groups of rats were decapitated during rest, after 1 h of treadmill running (20

Attenuation of reserpine-induced fibromyalgia via ROS and serotonergic pathway modulation by fisetin, a plant flavonoid polyphenol.

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Fibromyalgia (FM) is a chronic complex musculoskeletal disorder characterized by widespread musculoskeletal pain accompanied by fatigue, sleep disturbance, memory defects and mood changes. Fisetin, a plant flavonoid polyphenol, has been reported to possess potent antioxidant, antinociceptive and

Consequences of manganese administration for striatal dopamine and motor behavior in 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-exposed C57BL/6 mice.

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Environmental compounds may be important contributors to Parkinson's disease etiology. Epidemiological and experimental evidence for the facilitation of parkinsonism by manganese is equivocal. This work addressed methodological concerns in the few studies of manganese modulation of

Rats with higher intrinsic exercise capacities exhibit greater preoptic dopamine levels and greater mechanical and thermoregulatory efficiencies while running.

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The present study investigated whether intrinsic exercise capacity affects the changes in thermoregulation, metabolism and central dopamine (DA) induced by treadmill running. Male Wistar rats were subjected to three incremental exercises and ranked as low-performance (LP), standard-performance (SP)

Intrinsic Exercise Capacity in Rats Influences Dopamine Neuroplasticity Induced by Physical Training.

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The study evaluates whether the intrinsic capacity for physical exercise influences dopamine neuroplasticity induced by physical training. Male rats were submitted to three progressive tests until fatigue. Based on the maximal time of exercise (TE), rats were considered as low performance (LP),

Intrinsic exercise capacity is related to differential monoaminergic activity in the rat forebrain.

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Monoamines levels in central nervous system have been associated with exercise performance and fatigue. The present study investigated whether intrinsic exercise capacity is associated with differential activity of monoamines in the caudate-putamen (CPu) and accumbens (ACC) nucleus. Male Wistar rats

Tyrosine improves appetite, cognition, and exercise tolerance in activity anorexia.

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OBJECTIVE We have modified for mice the activity wheel model of Routtenberg to study the effects of tyrosine on exercise tolerance, behavior, and brain neurochemistry. METHODS Mice were fed for 2 h.d(-1) over a 2-wk period. During the second week, each group was injected daily with either saline or

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