Fig. 1From: Polysomnography, brain volumetry, and mismatch negativity as early biomarkers of amnestic mild cognitive impairment progressionHypnogram of a 63-year female progressive amnestic mild cognitive impairment patient showing decreased sleep efficiency, delayed rapid eye movement sleep latency, reduced REM % of total sleep time, and increased N3 non-rapid eye movement % of TSTBack to article page