Berklee Online recommends the following scores: 1  PTE Academic: 68. 2  TOEFL: iBT (internet-based): 100; Computer-based: 250; Paper-based: 600. 3  IELTS: 7.5 or higher.
1 Allergy can certainly cause foggy brain. 2  Wheat is a common cause of brain fog. 3  Many religious groups will fast for several days in order to âclear the brainâ. 4  Food allergy usually causes more than one symptom â often several.
1 Infections. 2  Meningitis and encephalitis, which are infections of the brain or the membrane that covers it, can cause confusion, memory loss or sudden dementia. 3  Untreated syphilis or Lyme disease can damage the brain and cause dementia.