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Abstract
We studied the level of noradrenaline and the density of alpha 2- and beta-adrenoreceptors in the brain stem and cerebral cortex of 12-day- and 21-day-old rat fetuses, as well as of rats at the ages of 1, 2, 5, 7, 9, 16, 21, 35, and 70 days. We found a positive correlation between the level of noradrenaline in the brain stem and the density of beta-receptors in the cerebral cortex, and between the amount of alpha 2- and beta receptors in the cerebral cortex, as well as between the values of each of these indices of the neurochemical system and body weight. Significant negative correlations (r = -0.72 and r = -0.88, respectively) were found between the amount of alpha 2-adreno-receptors in the brain stem and the content of noradrenaline in this brain region, as well as in the cerebral cortex. Explanations of these positive and negative correlations between the level of noradrenaline and the amount of adrenergic receptors in the rat brain during ontogenesis are discussed.
Published Version
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