But there are things you can do to alleviate the brain fog, according to this article:
*Pay closer attention: It takes 8 seconds of concentration to retain the information as a short-term memory.
*Use all your senses: Instead of just listening, write it down.
*Do brain exercises: Crosswords, Sudoku, puzzles or Scrabble stimulate the brain. Or even brush your teeth with your other hand or get dressed with your eyes shut. It requires your brain to work in new ways.
And this article suggests you may also want to try relaxation techniques like yoga, meditation or massage. One final tip — be sure to get enough sleep and exercise, which can improve cognition.