The Dysautonomia Project - Brain fog, or mental clouding, occurs when there is not an ideal amount of blood flow to the cerebral cortex. This lower blood flow causes difficulties with concentrating
Why do I get brain fog when I am menstruating? I become extremely lazy and I can't focus on anything. - Quora
Treating neurologic-like symptoms by addressing cervical spine instability and disrupted blood flow into the brain – Caring Medical Florida
The menstrual rhythm of the brain. Research shows in the female brain, regions important for memory and perception are remodeled in the course of the menstrual cycle : r/science