 Power calculations As this is a proof-of-concept, pilot study to examine the robustness of a novel methodology, it is inappropriate to conduct a formal power calculation. Our initial findings will determine whether our EEG analyses detects functional connectivity correlates of the synchronisation of anterior and posterior networks identified by fMRI BOLD signal during resting state scanning. Investigators will also explore if our data is comparable to previously published quantitative EEG on people with AD. Investigators will explore which measures from our data can discriminate people with Alzheimers disease from healthy controls. These initial results will give us likely effect sizes and allow us to conduct more accurate power calculations than are presently possible. This will be used to determine the sample size of a larger study of people with dementia. 