He is receiving more and more patients who have suffered from brain fog in connection with the covid infection.
The majority are previously completely healthy women in their 40s and 50s, he says.
One of those affected is Karin Nygårds.
She fell ill with covid-19 in March.
After a mild start, she suffered from severe memory and concentration difficulties, among other things.
(blue link to casevod)
Shows many different kinds of symptoms
What it is due to, or why the brain is affected in some covid patients and not in others, is not yet known.
One thing that puzzles doctors is that these patients show many different kinds of symptoms but without any demonstrable medical problems;
blood tests, X-rays and magnetic resonance imaging tests show nothing.
- Often these patients have been examined at other clinics, and there have been many examinations that show nothing, says Kristian Borg.
Research is ongoing in several places
He is now gathering knowledge about these patients, and research is underway in several places in the world to clarify what the brain fog is due to.
Two clues that are investigated are whether the virus damages the nerve cells or whether it is the person's defense against the virus that affects the brain.
Exactly how common it is in Sweden is not yet known, but according to Kristian Borg, the health centers report very many cases and several of them are referred to specialist clinics.
- I am surprised that there are so many, he says.
We have a queue of 37 patients awaiting investigation.
Get training programs
Patients at his rehabilitation clinic are examined by both doctors and psychologists and receive training programs that will improve their brain functions.
Even though doctors have only just begun to learn about these symptoms, Kristian Borg believes that the prognosis is good for regaining their normal brain functions.
- It is positive that you do not see any damage, no bleeding or clogging in the brain.
Those who come to our reception, we see that it goes a little up and down for but there is a line that it gets better.
But we do not know at this time how long it will take.