Summary
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1.
A method of chemical stimulation of the cat brain by microinjections through stereotaxically implanted needles is described.
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Of all the compounds tested, only acetylcholine and serotonin affected behavior. The effects of microinjections of acetylcholine and serotonin were modified unequally by preliminary intramuscular injection of the central cholinolytic benactyzine and the pharmacologically closely related antidepressant imipramine.
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Microinjections of compounds affecting serotonin metabolism (its precursor, 5-hydroxytryptophan, its antagonist BOL 148, and tetrabenazine, liberating serotonin from the tissues) and noradrenalin metabolism (inhibitors of synthesis, α-methyltyrosine and α-methyl-m-tyrosine; amphetamine, a stimulant liberating noradrenalin) into the three investigated areas led to no significant changes in behavior.
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Allikmets, L.K., Vakhing, V.A. & Lapin, I.P. Effects of direct injection of mediators and substances influencing their metabolism into the amygdala, septum and hypothalamus in cats. Neurosci Behav Physiol 2, 985–990 (1968). https://doi.org/10.1007/BF01124751
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DOI: https://doi.org/10.1007/BF01124751