Scientists have long struggled to define brain fog—let alone pinpoint a cause for it. But research is starting to reveal multiple potential causes from inflammation to a leaky blood-brain barrier.

Multiple sclerosis (MS) is best known for the physical symptoms it can cause, such as numbness, weakness, spasticity, and difficulty walking. But this autoimmune disease of the central nervous system ...

Researchers in Japan have pinpointed a biological cause of Long COVID brain fog using advanced PET brain imaging. They discovered widespread increases in AMPA receptor density linked to cognitive ...