Cognitive impairment, commonly referred to as 'brain fog,' is prevalent in over 80 percent of long COVID patients. A Japanese research team has made significant progress in exploring its causes by investigating changes in brain synapses. Utilizing the [¹¹C]K-2 PET imaging method, they analyzed 30 patients with cognitive long COVID (Cog-LC) and 80 healthy individuals, finding increased AMPA receptor density associated with cognitive deficits. Their findings suggest a potential diagnostic tool and treatment avenues for Cog-LC, thereby advancing understanding of this condition.
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