That's a very apt description of brain fog. However, I beleive that brain fog is caused the by the toxic metabolic waste products of the candida living in the small intestines. These toxic waste products are absorbed through the small intestine, enter the blood stream and thus, are carried to the brain.
I would hold that candida infection outside of the intestines, systemic candida, is rare in individuals with compentent immune systems. If you had an active candida infection in your brain you would be in an ICU or dead.