Visuoconstruction Errors in pathologically confirmed Alzheimer’s disease versus Alzheimer’s disease with Lewy Body disease patients

Clinical differentiation of Alzheimer’s disease (AD) versus Lewy Body Disease (LBD; including mixed AD‐LBD) is challenging, as both diseases overlap in cognitive symptoms. This can lead to misdiagnosis with detrimental consequences to the patient’s health. While autopsy‐based studies reveal that visuoconstruction tends to be more preserved in AD versus LBD and mixed AD‐LBD, it is well established that patients with AD also have visuoconstructional difficulties. To this end, this study examined performance on three visuoconstruction tasks and qualitatively coded errors on overlapping pentagons to characterize the types of constructional difficulties in pathologically confirmed AD versus LBD and mixed AD‐LBD.