Abstract: | Initially low level of motor search activity in test situations ("open field", maze) in rats previously grouped according to their passive behaviour with a partner-victim (Simonov method), does not essentially change after 3-week administration of phenazepam; the activity level of cytochrome oxidase in the cortex and hypothalamus is lowered. Phenazepam administration in conditions of prolonged unavoidable painful stimulation brings to a sharp increase of motor search activity and aggressive behaviour. Simultaneously the cytochrome oxidase activity increases in the same way as during a stress without phenazepam. This fact points to the independence of behavioural and biochemical effects in this case. |