Figure 1. Chemotaxis of peripheral blood mononuclear cells from Alzheimer’s caregivers to 1 nM () and 10 nM () FMLP or noncaregivers to 1 nM (•) and 10 nM () FMLP. Data are presented as cells migrating to FMLP divided by random migration of cells to media ± SEM. Blood was drawn at baseline and following the speech tasks. There was a differential change across the session with a significant dose x group x time interaction (F (1,25) = 5.1, p = .03).