exploratory activity in the open field and noradrenaline concentration in the neocortex and brain stem were investigated in intact rats ( n = 10 ) and in the following groups of rats with early postnatal neurotoxic ( 6-hydroxydopamine ) lesion of the catecholaminergic system : ( i ) rats with embryonal locus coeruleus grafts in the frontal neocortex ( n = 5 ) ;
C0006121
brain stem
C0023951
locus coeruleus