Fig. 1From: REM sleep is associated with the volume of the cholinergic basal forebrain in aMCI individualsFlowchart of the studyAbbreviations: AHI, apnea–hypopnea index; aMCI, amnestic mild cognitive impairment; MRI, magnetic resonance imaging; naMCI, non-amnestic mild cognitive impairment; PSG, polysomnography; RBD, REM sleep behavior disorder; REM, rapid eye movementBack to article page