PECULIARITIES OF EXPLORATIVE BEHAVIOR OF WISTAR RATS IN THE STEADY INHOMOGENEOUS MAGNETIC-FIELD

The influence of weak perturbations (up to 300 mu T) m the natural mag netic field (MF) (induced by the introduction of three constant magnet s) on the problem task solving in comlex mare Nas studied in two group s of Wistar rats, Under the action of inhomogeneous magnetic field the re were no spontaneous change of the orienting for the explorative act ivity independently of the individual in the presence of the organizat ion of goal-directed behaviour, instead of the expected explorative ac tivity, the stable and deep locomotor depression developed after orien ting in a new environment. Such a phenomenon was manifested only again st the background of informational loading. Nevertheless, under these conditions a short external stimulations resulted in even faster rat l earning than in the control animals, It is suggested that the MF chara cteristics play a crucial role in the transformation of the orienting (unconditioned activity) into the explorative (cognitive) activity.