Fig. 5.
Fronto-parietal connectivity (coherence) is decreased in Alzheimer groups relative to control group (n = 19) in delta and theta frequency ranges, whereas the Alzheimer subjects (n = 11) on cholinergic treatment display greater coherence values compared to the untreated Alzheimer group (n = 11). These responses are elicited upon the target stimulation to classical visual oddball paradigm