Pathophysiological Hypothesis of COVID-19 Psychosis.

ABSTRACT: In December 2019, a new coronavirus called SARS-CoV-2 was discovered in patients with pneumonia of unknown cause. Although respiratory symptoms mainly characterize infection by this virus, neuropsychiatric manifestations of the disease are becoming more and more frequent. Among them, the appearance of psychotic outbreaks in patients experiencing the infection or after a short time after it has resolved is remarkable. This narrative review aims to describe the possible relationship between SARS-CoV-2 and the onset of psychosis by developing the neurotropic capacities of the virus and analyzing the neurobiology of psychoses.

The prevalence of sleep paralysis in medical students in Buenos Aires, Argentina.

Objectives: The objectives of this study were to determine the prevalence of sleep paralysis (SP) in medical students from the University of Buenos Aires (UBA). Materials and Methods: An ad hoc questionnaire based on the diagnosis of SP and a demographic survey was electronically presented to students of Internal Medicine at the School of Medicine of the UBA. The respondents answered both questionnaires using Google Forms®. Results: The prevalence of SP was 40.7% (95% CI 33.5-47.8). A higher percentage of the respondents (76%) reported experiencing SP-related anxiety. An association between self-perceived quality of sleep and the incidence of SP was found (χ2: 12.712, P = 0.002). The highest frequency was hypnopompic SP (55.55%), and the highest percentage (55.4%) suffered from SP less than once every 6 months. Most respondents (59.5%) reported having started with SP symptoms after 18 years of age, and the highest percentage (66.2%) had exacerbated their symptoms at college. The frequency of the Incubus phenomenon was 14.5% (95% CI 6.2-23). Most respondents (70.8%) denied the association of SP with religious or paranormal beliefs. Conclusion: SP is highly prevalent in medical students and is associated with poor sleep habits and perceived poor sleep quality. Clinicians should be aware of this parasomnia to avoid a misdiagnosis of psychosis and inform sufferers of the nature of SP.

Psychotic Symptoms After SARS-CoV-2 Infection.

ABSTRACT: This case series reports three middle-aged male patients with no prior history of psychiatric disorders who developed psychotic symptoms with manic characteristics after COVID-19 infection. They presented mystic and paranoid delusions associated with euphoria, logorrheic, insomnia, and bizarre behaviors. Two of them required psychiatric hospitalization and one received corticosteroids. Treatment with antipsychotic medication improved their symptoms in a few weeks. This case series reports the new-onset psychosis probably due to COVID-19 infection. Pathogenetic speculation about the probable causes of COVID-19 psychosis, such as inflammatory reaction and corticosteroid use, was done. Moreover, other probable causes of manic psychosis, such as late-onset bipolar disorder, were also considered and ruled out. There is a need for more research to determine the causality between psychotic symptoms and COVID-19 infection.

Síndrome Pos-COVID y Síndrome de Fatiga Crónica: ¿Dos caras de la misma moneda? / POST-COVID SYNDROME AND CHRONIC FATIGUE SYNDROME: TWO SIDES OF THE SAME COIN

El síndrome de fatiga crónica es una enfermedad caracterizada, principalmente, por la manifestación de la fatiga, el dolor muscular difuso, y alteraciones en el sueño, en un periodo de no menos de 6 meses y que no son explicables por alguna causa. Es llamativo que, luego de un periodo de tiempo de padecer la COVID-19, los pacientes presenten síntomas similares a los hallados en el síndrome de fatiga crónica. A esta afección se la denomino síndrome pos-COVID. Los virus son los principales sospechosos en la aparición de ambos síndromes, estos podrían ocasionar la generación de daño mitocondrial, una neuroinflamación, alteración en el sistema glinfático o la disfunción en el eje hipotálamo-pituitario-adrenal entre otros. Dichos mecanismos serían los implicados en la aparición de los síntomas que padecen los pacientes con estos síndromes. El objetivo de esta revisión literaria es analizar y describir los posibles mecanismos que explicarían la manifestación de los síntomas del síndrome de fatiga crónica en los pacientes que hayan sufrido la COVID-19. Hasta el momento no existen tratamientos totalmente efectivos para erradicar los síntomas en ambos síndromes. Dado el abanico de síntomas que padecen estos pacientes, el enfoque terapéutico debe ser interdisciplinario para tratar de mejorar su calidad de vida.