Of those affected by Whipple's disease, 10–40% have problems related to the involvement of the brain; the symptoms relate to the part of the brain that is affected. The most common problems are dementia, memory loss, confusion, and decreased level of consciousness. Eye-movement disturbances and myorhythmia (rapidly repetitive movements of the muscles) of the face, together referred to as oculomasticatory myorhythmia, are highly characteristic for Whipple's disease. Weakness and poor coordination of part of the body, headaches, seizures, and a number of more uncommon neurological features are present in some cases.