[Personality traits as risk factors for the development of cognitive impairment and affective symptoms in patients with COVID-19].

Objective: To identify possible associations between premorbid personality traits and cognitive impairment and affective symptoms in patients who have recovered from COVID-19.

Material And Methods: The study included 30 people with the so-called post-COVID syndrome. The diagnosis of COVID-19 was previously confirmed by laboratory tests in each patient.

[Post COVID-19 disorders: is the epidemic of parkinsonism threatening the world?].

During the pandemic caused by SARS-CoV-2, the ability of this virus to infect the structures of the peripheral and central nervous system becomes increasingly clear. Damage to the nervous system is noted in almost 85% of patients who have had COVID-19, both those who have had this disease in severe form, and in patients with mild or asymptomatic course. COVID-19 worsens symptoms in patients with Parkinson's disease (PD), which potentially increases the risk of death due to pneumonia and respiratory disorders in patients with severe stages of PD.

A Recent Ten-Year Perspective: Bile Acid Metabolism and Signaling.

Bile acids are important physiological agents required for the absorption, distribution, metabolism, and excretion of nutrients. In addition, bile acids act as sensors of intestinal contents, which are determined by the change in the spectrum of bile acids during microbial transformation, as well as by gradual intestinal absorption. Entering the liver through the portal vein, bile acids regulate the activity of nuclear receptors, modify metabolic processes and the rate of formation of new bile acids from cholesterol, and also, in all likelihood, can significantly affect the detoxification of xenobiotics.

[Tinnitus: clinical and pathogenetic aspects].

The article discusses the pathogenetic and clinical features of tinnitus. It is emphasized that various causes contribute to the appearance of tinnitus, including somatic diseases, excess body weight, iatrogenies, otological diseases with an outcome in hearing loss. The anatomical and physiological features of the structure of the central part of the auditory system are considered.

[Ethics and medicine].

The article deals with the problem of ethical constituent both in medical and teaching practice. As to the medical practice, its ethical component is treated as an obligatory one, no matter what physician specialty is. That is why, the importance of ethical aspects in medicine increases greatly now.