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  • Title: [Brain monoamines and circadian rhythm of spontaneous motor activity of rats].
    Author: Kayser C, Hildwein G.
    Journal: C R Seances Soc Biol Fil; 1977; 171(2):450-5. PubMed ID: 142569.
    Abstract:
    The effect of three drugs, parachlorophenylalanine, nialamide and disulfiram, drugs known by their action on the two sleep phases, slow wave sleep and I-REM-sleep, have been studied and tested by their effect on the motor circadian rhythm : PCPA and disulfiram reduce the amplitude of the rhythm by two opposed mechanisms : PCPA increases the motor activity, especially the day-time activity, disulfiram reduces the motor activity, especially the night-time activity. The former reduces the serotonine content, the latter the noradrenaline content of the central nervous system. Nialamide (5 or 10 mg/1000 g) is without any action of the rhythm. Both doses increase very much the motor activity ; but the central excitatory state undergoes the normal circadian rhythm. This monoaminoxydase inhibitor is without any action on the circadian rhythm.
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