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noradrenaline/fatiga muscular
L'enllaç es desa al porta-retalls
Pàgina 1 des de 154 resultats
Neuropsychological performance and noradrenaline function in chronic fatigue syndrome under conditions of high arousal.
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BACKGROUND
Subjective and objective impairments in neuropsychological function have been reported in chronic fatigue syndrome (CFS) patients under conditions of high arousal. These impairments may reflect impaired central noradrenaline function such as impaired post-synaptic alpha-2 adrenoceptor
Effects of noradrenaline and dopamine on supraspinal fatigue in well-trained men.
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OBJECTIVE
Prolonged exhaustive exercise induces a failure of the nervous system to activate the involved muscles maximally (i.e., central fatigue). Part of central fatigue may reflect insufficient output from the motor cortex (i.e., supraspinal fatigue), but the cause is unresolved. To investigate
Changes in heart rate, noradrenaline, cortisol and mood during Tai Chi.
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Changes in psychological and physiological functioning following participation in Tai Chi were assessed for 33 beginners and 33 practitioners. The variables in the three-way factorial design were experience (beginners vs practitioners), time (morning vs afternoon vs evening), and phase (before Tai
The impact of fatigue and energy on work functioning and impairment in patients with major depressive disorder treated with desvenlafaxine.
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Fatigue and low energy are cardinal symptoms of major depressive disorder (MDD) that have an impact on work functioning. Antidepressants with noradrenergic activity have been hypothesized to improve symptoms of fatigue and low energy. We examined the impact of these symptoms on work functioning in
Does baseline fatigue influence treatment response to reboxetine or citalopram in depression? An open label randomized controlled trial.
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It has been suggested that antidepressants that increase noradrenergic transmission should be better than serotonergic antidepressants at treating fatigue in depression. We conducted a secondary analysis of an RCT in which patients with depression were randomly assigned to reboxetine (a
Co-release of neuropeptide Y and noradrenaline from pig spleen in vivo: importance of subcellular storage, nerve impulse frequency and pattern, feedback regulation and resupply by axonal transport.
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The importance of subcellular storage, nerve impulse rate and pattern, and feedback regulation, as well as resupply by axonal transport for the release of noradrenaline and neuropeptide Y-like immunoreactivity, was studied in the blood perfused pig spleen in vivo. Vasoconstrictor responses were
[Catecholamines, their precursors and metabolites in human fatigue after exertion].
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Alterations in metabolism of catecholamines were studied in sportsmen after development of acute fatigue as a result of the test physical loading. Three types of the alterations were characterized on the basis of differences in excretion with urine of free and sulphate-bound adrenaline,
Region-Specific Dissociation between Cortical Noradrenaline Levels and the Sleep/Wake Cycle.
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OBJECTIVE
The activity of the noradrenergic system of the locus coeruleus (LC) is high in wake and low in sleep. LC promotes arousal and EEG activation, as well as attention, working memory, and cognitive flexibility. These functions rely on prefrontal cortex and are impaired by sleep deprivation,
Circadian rhythms of catecholamine excretion, shooting range performance and self-ratings of fatigue during sleep deprivation.
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Circadian rhythms in urinary catecholamine excretion, performance and self-ratings were studied in two experiments with a total of 29 subjects who were deprived of sleep for 72 hr. Adrenaline excretion and fatigue ratings showed the most consistent circadian variations; noradrenaline and performance
Post-operative fatigue following coronary artery bypass surgery: relationship to emotional state and to the catecholamine response to surgery.
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Post-operative fatigue is an important subjective problem for surgical patients, but its basis is unknown, and the possibility of a psychological component has been neglected. To investigate its putative physiological and psychological bases, 74 patients undergoing coronary artery bypass graft
Disturbed neuroendocrine-immune interactions in chronic fatigue syndrome.
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The present study was designed to investigate the interaction between neuroendocrine mediators and the immune system in chronic fatigue syndrome (CFS). We examined the sensitivity of the immune system to the glucocorticoid agonist dexamethasone and the beta2-adrenergic agonist terbutaline in 15
Fatigue and cardiac and endocrine metabolic response to exercise after abdominal surgery.
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Subjective feeling of fatigue was quantified before and 20 days after elective uncomplicated abdominal surgery in 16 otherwise-healthy patients and compared with changes in heart rate and various hormonal and substrate responses to a 10-minute bicycle exercise (65% of preoperative maximal work
[Evaluation of mental stress and fatigue induced by performance of a mental task. 2. An experiment in 11-h self-paced calculating task].
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An assessment of mental stress and fatigue was undertaken in 12 male students who did their best to perform a calculating task (addition and subtraction of 2-digit numbers) for 11 hours on a workday and rested without any task for 11 hours on a restday. During the work period, occipital midline
[Interaction of catecholamines and corticosteroids during the process of muscle fatigue].
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After prolonged (8 hrs) swimming, the level of corticosteroids was reduced and the contents of aldosterone and DOC in the blood was increased in the rats. At incubation of these rats' adrenals in the L-thyrosine substratum the synthesis of adrenaline was reduced. Addition of hydrocortisone,
Noradrenaline Reuptake Inhibition Impairs Cortical Output and Limits Endurance Time.
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To assess the neural mechanisms that limit endurance time, we compared a fatiguing task performed under the influence of reboxetine (REB), a noradrenaline reuptake inhibitor, and placebo (PLA).
Nine male subjects (age = 24 ± 2 yr) participated in this study. The fatiguing task involved repeated 3-s
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