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The dynamics of exploratory activity in male and female Wistar rats before weaning and over the course of puberty was investigated. Behavior of animals was examined on the 18th, 35th, and 50th postnatal days in a modified light-dark test and on the 24th postnatal day in an open-field test. It was found that exploratory activity of males considerably changed… (More)
The effects of socially enriched environment on exploration activity in early age and avoidance learning in adult rats were studied. Rats reared in enriched environment were housed with mother and three young rats before weaning. Control rats were housed with mother only. An increase in exporation activity in the open-field test and modified plus-maze was… (More)
Maturation of specific behavioral reactions were studied in 13-24-day-old rats born by females with prior maternal experience (group A) and maternally naive females (group B). The rats of group B showed later eyes opening and earlier maturation of grooming and manipulation than the group A rats. The development of behavioral reactions was found to be… (More)
The dynamics of freezing and flight reactions in juvenile rats was investigated. The rats were tested on the 20th, 25th, 35th, and 40th postnatal days. A sound of 6-sec duration (bell) was used as a threatening stimulus. The following parameters were recorded: number of rearing reactions and defecations within 5 min prior to stimulation, reactions to the… (More)
Influence of restricted sensory afferentation in rats forming of defensive reactions was studied by vibrissectomy from 9 to 20 day of postnatal ontogeny. Defensive withdrawal reaction in response to touch from 10 to 18 day, duration of freezing on 20 day, "open field" behavior on 25 day were measured. Intensity of withdrawal reactions, freezing duration,… (More)
The influence of daily all whiskers trimming from the 2nd or 9th to 20th postnatal day on maturation time of walking, rearing, grooming, manipulation activity and eye opening was studied in deprived rat pups and their sibs. In pups trimmed beginning from the day 2 and their sibs, eye opening occurs earlier. Also, grooming and rearing mature earlier, whereas… (More)