INFORMATIONAL STRESS AS A DEPRESSION INDUCING FACTOR (EXPERIMENTAL STUDY).

Chronic psychogenic stress represents the major initiating agent of psychoneural diseases including depression. We used informational stress model for the purpose of modelling chronic psychogenic stress and depression. The aim of the research was to study behavior of dominant and submissive rats at different stages of informational stress and during depression state.

BEHAVIORAL CHARACTERISTICS OF RATS ON VARIOUS HIERARCHICAL LEVEL CAUSED BY ACUTE INFORMATIONAL STRESS.

The aim of our research was to study behavioral indices of rats standing on various hierarchical level in the conditions of acute informational stress as well as their resistance to stress taking into account their social status. The Animal's behavior has been studied in conflict and agonist conditions against the background of high food and thirst motivation. After determination of hierarchical relations the stressing procedure of two active avoidance reactions was performed simultaneously during one trial (14 days).

[Chronic psychogenic stress as a factor of formation depressive behavior in rats].

The problem of adequate animal model of depression still remains. In our experiments depression-like condition on white rats were reached by the chronic stressors of psychogenic nature. Stress was carried out in a modified shuttle chamber of active avoidance.

Association between tree pollen counts and asthma ED visits in a high-density urban center.

Background: Asthma exacerbation patterns are cyclic in nature and often correlate with air particle concentrations.

Objective: To examine the relationship between asthma-related emergency department (ED) visits and outdoor air quality for pediatric and adult patients in a high asthma prevalence area, the New York City borough of the Bronx.

Methods: Numbers of daily asthma-related adult and pediatric ED visits during one complete year (1999) were obtained from the seven major Bronx hospitals.

[Study of self-regulating behavior at different stages of psychogenic stress before the formation of depressive-like state in rats].

During last decades abnormalities of neuro-psychic sphere have become a topic of great interest. Among them an important place takes depression. Psychogenic factors are commonly the most frequent cause of depressive condition, and till now the study of so-called transitional period (from the beginning of stressor action till the formation of depressive state) continues to be an actual task of scientific research.