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For many people, COVID-19 infection is either symptomatic or mild (though what counts as “mild” may include fever, dry cough, shortness of breath – everything until hospitalization). is). People with mild cases usually feel better within two weeks, while those with more severe cases may take six weeks to recover. A small (but increasing) percentage of patients also experience what is called “long COVID”, or symptoms that persist for months. The nature of symptoms may vary, but in people with long-lasting COVID-19, there is a particularly disturbing “brain fog”, a non-medical term used to treat delusions, amnesia, Symptoms such as inability to concentrate and trouble in communication are done.
It is difficult to know how many COVID-19 survivors experience brain fog, but Igor Koralnik, head of neuro-infectious disease at Northwestern Medicine in Chicago, reported that Times They believe that there are thousands. Michael Zandi, consultant at UCL Queen Square Institute of Neurology in London, told Guardian Studies conducted so far have placed a proportion of COVID-19 survivors who experience up to 20 percent of cognitive symptoms. Meanwhile, a French study on 120 COVID patients admitted to the hospital found that 34 percent experienced memory loss and 27 percent experienced concentration issues after recovery.
Experts such as Zandi have generally noted cognitive impairment and brain fog in older patients with more severe COVID cases, and especially among those hospitalized and / or on ventilators. But Anna Nordwig, a neurologist and postdoctoral clinical and research fellow at Columbia University Vagelos College of Physicians and Surgeons, has reported seeing “a trickle” of younger patients with brain fog symptoms. Most, she says, recover.
Doctors are not sure, but there are many theories. Serena Spudich, head of neurological infection and global neurology at Yale School of Medicine, told Times The reason may be swelling of blood vessels. The body’s immune response to COVID-19 can release inflammatory molecules, which, she says, can be toxic to the brain. Another possibility, Spudich says, is that the immune response causes the body to accidentally attack nerve cells.
One explanation may be a lack of oxygen to the brain in hospitalized patients, especially those on ventilators.
Another possibility is that some (if not all) of those experiencing brain-fog-like symptoms then COVID-19 survivors are a form of PTSD, a study by Andrew Levine, a clinical professor of UAVA and neuropcycologist. Is according to Levine found that patients with SARS and MERS (two previous coronaviruses) had a greater risk for PTSD, and hypothesized that COVID-19 might work in a similar way. Since ‘brain fog’ is a relatively widespread and impenetrable word, some of the symptoms that make it abbreviated can also be explained by extreme fatigue, poor mood, and stress – all of which are expected reactions to the epidemic.
This, again, is difficult to know for sure. There are COVID-19 survivors who report months of brain fog, but neurologists say they have yet to find any evidence of permanent brain damage on patients’ MRI scans. We know that some SARS and MERS patients, most of whom were hospitalized, reported psychiatric illnesses and years of fatigue. According to Nordwig, COVID-19 is the first time neurologists have had to study long-term cognitive impairment potential in dairy cases of coronovirus.