via email -
What We Know About Covid's Impact on Your Brain: QuickTake
2024-09-13 02:00:27.756 GMT
By Jason Gale
(Bloomberg) -- Many of Covid’s earliest and most alarming
effects involve the brain, including a lost sense of smell,
sluggish thinking, headaches, delirium and strokes. More than
four years after the pandemic began, researchers are recognizing
the profound impacts Covid can have on brain health, as millions
of survivors suffer from persistent issues such as brain fog,
depression and cognitive slowing, all of which hinder their
ability to work and otherwise function. Scientists now worry
that these symptoms may be early indicators of a coming surge in
dementia and other mental conditions, prolonging the pandemic’s
societal, economic and health burden.
What Studies Show
In 2021, UK researchers reported early results from a study
comparing brain scans taken before and after the pandemic began.
They discovered signs of damage and accelerated aging in the
brain, particularly in the region responsible for smell, even in
patients who had experienced mostly mild cases of Covid months
earlier.
Research has since shown that Covid-related cognitive
deficits can persist for years, especially in older adults and
those who suffered more severe cases. For instance, a study of
seniors hospitalized during China’s first Covid wave showed that
2 1/2 yearslater, 40% developed cognitive impairment, compared
with just 14% of their uninfected spouses.
A 2024 UK study of
people hospitalized for Covid treatment revealed a significant
worsening of psychiatric and cognitive symptoms three years
after discharge. Half experienced moderate to severe depression,
a quarter suffered severe cognitive decline, and one in nine
showed a loss of mental function equivalent to a 30-point drop
on the IQ scale, where a score of 100 is average.
snip
How Covid Harms the Brain
The effects of a SARS-CoV-2 infection on the brain are the
focus of intense research and remain only partially understood.
Studies suggest that during acute infection, the virus may
damage nerves, particularly in the olfactory bulb — which houses
the nerves that transmit smell impulses to the brain — leading
to problems that can persist for years. In some cases, the virus
may infect the brain through this pathway, altering the organ’s
structure and resulting in impaired cognition and fatigue.
Persistent viral remnants or the initial infection itself
may trigger neuroinflammation and disrupt the immune system,
causing antibodies and T cells to mistakenly attack healthy
brain cells, damage blood vessels, and harm the blood-brain
barrier. Additional research points to blood clots that may
drive immune activation, restricting the supply of oxygen and
nutrients to the brain, and altered levels of key hormones
cortisol and dopamine that may be linked to changes in gut
health.
.........
----------------------------------------------------
Please see our scientific library for many studies on the clinical and pathological effects - including the brain:
https://flutrackers.com/forum/forum/welcome-to-the-scientific-library/pathological-findings