Metabolic issues in the brain
Scans show that specific parts of the brain have significantly lower energy use in individuals with Long Covid.
These abnormal scans clearly separate healthy patients from those with Long Covid symptoms, who report loss of smell and taste, memory problems, sleep disorders, chronic pain, and other symptoms weeks or months after the initial infection.
Source: 18F-FDG brain PET hypometabolism in patients with long COVID | SpringerLink