Detailed analysis of GABAB receptor/G protein coupling in the course of prenatal and postnatal development of rat brain cortex. Potency of G protein response to baclofen and SKF97541 stimulation and the individual variance among those agonists. Plasma membrane density of GABAB receptors during ontogeny. Ontogenetic development of Na+/K+–ATPase. Level of lipofuscin like pigments (LFP) in the rat brain cortex during the postnatal life.