Abstract

Behavioral reactions of rats were studied under conditions of constant exposure to ultrasonic irradiation at a frequency of 20-45 kHz for 21 days. In rats subjected to ultrasound, impaired behavior in the social interest test and Porsolt forced swimming test was observed; the development of anhedonia in the sucrose preference test was revealed (manifested in the symptoms of depression). The effects of ultrasonic irradiation were abolished by an antidepressant fluoxetine, a selective serotonin reuptake inhibitor. Our results indicate that chronic exposure to ultrasonic radiation produces a modulatory effect on depressive symptoms in rats. These changes satisfy the requirements for experimental animals, which are used as a model of psychopathological processes.

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