Search Results - "Grigoryan, G A"

Effects of Social Isolation on the Development of Anxiety and Depression-Like Behavior in Model Experiments in Animals by Grigoryan, G. A., Pavlova, I. V., Zaichenko, M. I.

“…This review describes the role of social isolation in the development of anxiety and depression-like behavior in rodents. The duration of social isolation, age…”
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Stability Criterion for Systems of Two First-Order Linear Ordinary Differential Equations by Grigoryan, G. A.

“…The method of Riccati’s equation is applied to find a stability criterion for systems of two first-order linear ordinary differential equations. The obtained…”
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Effects of Social Isolation and an Enriched Environment on Anxious-Depressive Behavior in Rats in Normal Conditions and after Early Proinflammatory Stress by Pavlova, I. V., Broshevitskaya, N. D., Zaichenko, M. I., Grigoryan, G. A.

“…The effects of being housed in different conditions (standard, social isolation, short periods in an enriched environment) from age 1.5 months to age 3.5…”
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On the stability of systems of two first-order linear ordinary differential equations by Grigoryan, G. A.

“…We use the Riccati equation method to establish necessary and sufficient stability conditions and a stability criterion for a system of two first-order linear…”
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Global solvability tests for a scalar Riccati equation with complex coefficients by Grigoryan, G. A.

“…We obtain two global solvability tests for a scalar Riccati equation with complex coefficients. One of them is used to prove a test for the existence of a…”
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Sex Differences in the Influences of Early Proinflammatory Stress on Learning and Memory in Adult Rats in the Morris Water Maze by Zaichenko, M. I., Sharkova, A. V., Pavlova, I. V., Grigoryan, G. A.

“…The effects of early proinflammatory stress induced by administration of bacterial lipopolysaccharide (LPS) on the days 3 and 5 of life on learning and…”
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Effects of Ovariectomy on Anxious-Depressive Behavior in Female Rats in Normal Conditions and after Early Proinflammatory Stress by Pavlova, I. V., Broshevitskaya, N. D., Zaichenko, M. I., Grigoryan, G. A.

“…The role of female sex hormones produced by the ovaries in the occurrence of sex-related features in the anxious-depressive behavior of rats was studied…”
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Modulation of latent inhibition in the rat by altered dopamine transmission in the nucleus accumbens at the time of conditioning by Joseph, M.H., Peters, S.L., Moran, P.M., Grigoryan, G.A., Young, A.M.J., Gray, J.A.

“…Latent inhibition describes a process by which pre-exposure of a stimulus without consequence retards the learning of subsequent conditioned associations with…”
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Some properties of solutions of a scalar Riccati equation with complex coefficients by Grigoryan, G. A.

“…We give the definition of normal and limit solutions of the Riccati equation with complex coefficients and study some properties of these solutions. We prove…”
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Ability to Discriminate Visual Signals in the Morris Water Maze in High- and Low-Impulsivity Rats by Zaichenko, M. I., Merzhanova, G. Kh, Grigoryan, G. A.

“…High-impulsivity (HI) rats learned to locate a visible platform bearing a special stimulus object (a bannerette) in the Morris water maze more quickly than…”
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Effects of Ovariectomy on Learning in Rats in Health and after Early Proinflammatory Stress by Pavlova, I. V., Zaichenko, M. I., Broshevitskaya, N. D., Sidorina, V. V., Sharkova, A. V., Grigoryan, G. A.

“…We report here studies on the effects of ovariectomy (OE) in females performed at age 35 days on the development and extinction of a conditioned fear reaction…”
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Effects of Early Proinflammatory Stress on Manifestations of Impulsive Behavior in Rats of Different Ages and Sexes by Gruzdeva, V. A., Sharkova, A. V., Zaichenko, M. I., Grigoryan, G. A.

“…Experiments on Wistar rats addressed the manifestations of impulsive behavior in relation to age and sex in three groups of animals. One group received s.c…”
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Necessary conditions and a test for the stability of a system of two linear ordinary differential equations of the first order by Grigoryan, G. A.

“…We use the Riccati equation method for the derivation of necessary conditions and a test for the stability of a system of two linear first-order ordinary…”
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MK-801 Impairs Reconsolidation of a “New” Memory and Affects the “Old” Memory in Operant Feeding-Related Behavior in an Eight-Arm Radial Maze in Rats by Zaichenko, M. I., Zakirov, Ph. Kh, Markevich, V. A., Grigoryan, G. A.

“…Spatial memory deteriorated significantly in feeding-related operant behavior in an eight-arm radial maze in rats as a result of reactivation using a single…”
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Escape and Avoidance Reactions to Painful Electrocutaneous Stimulation of the Self and Another in Rats with High and Low Levels of Impulsivity by Zaichenko, M. I., Grigoryan, G. A., Merzhanova, G. Kh

“…Reactions escaping intrinsic electrocutaneous pain stimulation were more marked in high-impulsivity rats than low-impulsivity and ambivalent animals. The mean…”
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Some properties of solutions of systems of two linear first-order ordinary differential equations by Grigoryan, G. A.

“…Using the representation of the general real solution of a system of two linear first-order equations via the imaginary component of the complex solution of…”
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Conditioned Reflex Reactions in High-Impulsivity Rats Are Weaker than Those in Low-Impulsivity Animals by Pavlova, I. V., Zaichenko, M. I., Merzhanova, G. K., Grigoryan, G. A.

“…The delay discounting procedure was used to classify rats into high-impulsivity (preferring low-value immediate food reinforcement) and low-impulsivity…”
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Effects of Early Proinflammatory Stress on Anxiety and Depression-Like Behavior in Rats of Different Ages by Broshevitskaya, N. D., Pavlova, I. V., Zaichenko, M. I., Gruzdeva, V. A., Grigoryan, G. A.

“…Early proinflammatory stress created by administration of lipopolysaccharide (LPS) (50 μg/kg s.c.) on days 3 and 5 of postnatal life led to decreases in…”
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Animal Models of Depression: Behavior as the Basis for Methodology, Assessment Criteria and Classifications by Grigoryan, G A, Gulyaeva, N V

“…Analysis of the current state modeling of depression in animals is presented. Criteria and classification systems of the existing models are considered as well…”
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Determining the Positions of Seismically Active Faults in Platform Regions Based on the Integrated Profile Observations by Levshenko, V. T., Grigoryan, A. G.

“…By the examples of the Roslavl’skii, Grafskii, and Platava–Varvarinskii faults, the possibility is demonstrated of mapping the geological objects by the…”
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