Brain Fog is a Stubborn Symptom of Long COVID

by | May 10, 2022 |

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Many millions of Americans who have survived COVID infection now suffer from Long COVID. A frequent symptom is brain fog consisting of diminished concentration, memory, critical thinking, focus, and cognitive capabilities. It is mental fuzziness. The fuzzy sluggish mind is not what it used to be. This condition may go on for months or years after the initial COVID infection, which may have been mild and not severe or symptomatic.

The Many Facets of Brain Fog

There are many other ways to understand brain fog in terms of common everyday activities:

> Difficulty planning and prioritizing activities and tasks.

> Difficulty estimating how long things will take.

> Having to read or listen a few times to “take in” information.

> Not being able to think of the right word or forgetting what you wanted to say in the middle of talking.

> Taking longer to learn new processes or activities.

> Mental fatigue, as significant as physical fatigue, plagues many long COVID victims.

> Chronic inability to store new information in your brain or recall the older ones.

> Partial impairment in the use and understanding of language.

> Problems with planning and organizing the weekly schedule as you used to.

> Loss of ability to make calculations and resolve problems quickly.

> Gradual deterioration of brain functions that help in recognizing shapes and plotting charts or directing into your daily destinations.

> Mental confusion and lack of concentration.

> Chronic tiredness, people feel as if they have no energy to execute their daily chores.

> Forgetfulness, a lack of memory resulting in missed appointments and other important events.

In severe, chronic cases, people have difficulty working or doing daily activities that require mental concentration, multitasking, and coordination. Quality of life is severely impacted.

University of Cambridge Findings

The research found seven in ten long COVID patients experience concentration and memory problems several months after the initial onset of their disease, with many performing worse than their peers on cognitive tests,

Half of the patients in the study reported difficulties in getting medical professionals to take their symptoms seriously, perhaps because cognitive symptoms do not get the same attention as lung problems or fatigue.

In a study of 181 Long COVID patients, 78% reported difficulty concentrating, 69% reported brain fog, 68% reported forgetfulness, and 60% reported problems finding the right word in speech. These self-reported symptoms were reflected in significantly lower ability to remember words and pictures in cognitive tests.

The majority of the victims suffered COVID-19 at least six months before the study began. Very few people had been ill enough with COVID-19 to be hospitalized.

Participants carried out multiple tasks to assess their decision-making and memory. These included remembering words in a list, and remembering which two images appeared together. The results revealed a consistent pattern of ongoing memory problems in those who had suffered COVID-19 infection. Problems were more pronounced in people whose overall ongoing symptoms were more severe.

These were other findings: People who experienced fatigue and neurological symptoms, like dizziness and headache, during their initial illness were more likely to have cognitive symptoms later on. They also found that those who were still experiencing neurological symptoms were particularly impaired on cognitive tests.

“This is important evidence that when people say they’re having cognitive difficulties post-COVID, these are not necessarily the result of anxiety or depression. The effects are measurable – something concerning is happening,” said Dr. Muzaffer Kaser, a researcher in the University of Cambridge’s Department of Psychiatry who was involved in the study.

Causes

The likely causes of brain fog are inflammation, decreased blood flow, and decreased oxygen in the brain. Commenting on a new research finding of evidence of brain inflammation in long COVID victims: This information is important, noted Avindra Nath, MD, clinical director of the National Institute of Neurological Disorders and Stroke at the NIH, who wasn’t involved with the study.

“It’s consistent with the observation that there’s a fair bit of vascular injury and repair taking place,” Nath said. “In our COVID pathology research, we found there is disruption of small blood vessels in the brain: they leak a lot of protein into the brain and that sets up the inflammation.” This view is consistent with findings of micro blood clots in Long COVID people.

One analysis noted that even people with mild cases of COVID could experience sustained cognitive impairments, including reduced attention, memory, and word-finding. Possible long-term neurological problems from COVID constitute “a major public health crisis,” according to Avindra Nath of NIH.

One research study found three factors (i.e., female sex, respiratory problems at the onset of infection, and ICU admission) were significantly associated with reporting chronic post‐COVID brain fog by the patients.

There has also been serious discussion of brain fog and other long COVID effects resulting from COVID vaccines.

Solutions

There are no widely used and proven cures. Some infectious disease experts recommend following an anti-inflammatory diet. Avoid fried foods, food high in saturated fat, and added sugars that cause inflammation. The Mediterranean diet, for example, is rich in antioxidants, which are known to mitigate inflammatory effects in the brain and body. Also, get adequate rest and stay hydrated, according to some physicians.

The Harvard Medical School recommends:

> Aerobic exercise
> Eating a Mediterranean-style diet
> Pursuing “beneficial” activities (listening to music, reading a novel)
> Participating in social activities
> Avoiding alcohol and drugs
> Sleeping well

According to Dr. Billie Schultz, a Mayo Clinic physical medicine and rehabilitation expert, while there’s no one-size-fits-all treatment that can cure these cognitive difficulties, some rehabilitation strategies can retrain the brain to work on the most challenging areas.

“Typically, it means going into work with a therapist initially once or twice over the course of a month. And getting homework. I want you to try to utilize these strategies in your day-to-day life. Because, ultimately, that’s what decides if they’re working.”

If you know someone with brain fog, take it seriously. It is not merely a psychological disorder or complaint but a malady with a biological cause and no easy fix for it.

Dr. Joel S. Hirschhorn

Dr. Joel S. Hirschhorn, author of Pandemic Blunder and many articles and podcasts on the pandemic, worked on health issues for decades, and his Pandemic Blunder Newsletter is on Substack. As a full professor at the University of Wisconsin, Madison, he directed a medical research program between the colleges of engineering and medicine.

Dr. Hirschhorn worked on public policy for the US Congress for many years. As a senior official at the Congressional Office of Technology Assessment and the National Governors Association, he directed major studies on health-related subjects; he testified at over 50 US Senate and House hearings and authored hundreds of articles and op-ed articles in major newspapers. He has served as an executive volunteer at a major hospital for more than 10 years. He is a member of the Association of American Physicians and Surgeons, and America’s Frontline Doctors.

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