The Use of EEG in Alzheimer's Disease, With and Without Scopolamine - A Pilot Study

Inclusion Criteria: Healthy subjects: * Between 60-80 years of age. * Volunteers will have to be in good general health as determined by standard physical examination. * Normal Electrocardiograph (ECG) MCI subjects: * Diagnosed with MCI at the Memory Clinic at the Landspitali University Hospital using F 06,7 according to International Classification of Diseases (ICD) - 10. * Between 60-80 years of age. * Subjects need to score between 2 and 3 on the Global Deterioration Scale (GDS). * Normal ECG Alzheimer's patients: * Diagnosed with AD according to ICD - 10 in Follow up at the Memory Clinic at the Landspitali University Hospital. * Between 60-80 years of age. * Subjects need to score between 3-5 on the GDS. * Normal ECG * Treated with Reminyl® for the Alzheimer disease. Exclusion Criteria: * Smoking or any other use of tobacco. * Taking neuroleptics or benzodiazepines (allowed to take oxazepam ad vesp). * Neurological-, cardiovascular-, gastrointestinal- or genitourinary disorders of medical importance. * Glaucoma or history of possibly raised intraocular pressure. * Impaired liver- or kidney function. * Hypersensitivity to Scopolamine or any component in the formulation. * Any indication of drug, alcohol or medicine abuse. * Participation in another investigational study at the same time.