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Perhaps lack of sleep leads to disruption of the brain's serotonin systems.
2
Abnormal alterations of serotonin levels are associated with changes in normal functioning.
3
No significant differences in the serotonin level between the sexes were observed.
4
It could be that sunlight affects serotonin in the body, they say.
5
Secondly, we depleted serotonin at the time of onset of the inflammation.
1
With subsequent microinjections, the effects of 5-HT on REM sleep were similar.
2
Thus, hypophagia is unlikely to be caused by inhibition of 5-HT reuptake.
3
Secretagogue infusion significantly increased the level of circulating CCK, but not 5-HT.
4
The maximal inhibition of 5-HT clearance was greater after PMA than MDMA.
5
Both compounds also antagonized the citalopram-elicited, endogenous 5-HT-mediated inhibition of cell firing.
1
And this antidepressant-like effect may be mediated by 5-hydroxytryptamine and glutamate systems.
2
Postmortem investigations of hypothalamus from Alzheimer brains have shown reduced concentrations of 5-hydroxytryptamine.
3
In contrast, the dopamine level was decreased, and the 5-hydroxytryptamine level was not significantly affected.
4
These studies suggest that 5-hydroxytryptamine may participate in the vagal inhibitory pathway to the lower esophageal sphincter.
5
The same effect occurring in other cholinergic cell bodies initiates action potentials which are responsible for the 5-hydroxytryptamine-induced release of acetylcholine.