Fig. 3
From: EEG alpha reactivity and cholinergic system integrity in Lewy body dementia and Alzheimer’s disease
Group comparison. a Group comparison of alpha reactivity. b Group comparison of NBM volumes (normalised with respect to total intracranial volume). In each boxplot, the central line corresponds to the sample median; the upper and lower borders of the box represent the 25th and 75th percentile, respectively; and the length of the whiskers is 1.5 times the interquartile range. Corresponding results from statistical comparisons between the groups are presented in Table 2. AD, Alzheimer’s disease; DLB, dementia with Lewy bodies; HC, healthy controls; NBM, nucleus basalis of Meynert; PDD, Parkinson’s disease dementia