Amyloid deposition is associated with impaired default network function in older persons without dementia.

Sperling RA, LaViolette PS, O'Keefe K, O'Brien J, Rentz DM, Pihlajamäki M, Marshall G, Hyman BT, Selkoe DJ, Hedden T, et al.
Neuron. 2009 Jul 30; 63(2):178-88. PMID: 19640477. Abstract