for their interest in our ar-ticle and for the comments and questions they raised.The fundamental question was that: “The use of CERAD (Consortium to Establish a Registry for Alzheimer’ Disease) is indicated to Alzheimer’ Disease… being un-suitable for subcortical dementia such as Parkinson’s disease de-mentia”. “CERAD battery is sensitive to capture limbic amnesia, apraxia, agnosia and naming deficits, which are relatively com-mon in Alzheimer’s disease but rarer in subcortical forms of de-mentia, and…. less sensitive to detect some executive dysfunction which are very common in Parkinson’s disease dementia”We would like to raise the following considerations with re-spect to this question:1) It is not really adequate to label Parkinson’s disease (PD) dementia as “subcortical”, since when there is dementia in PD, the post-mortem examinations show an association with limbic or neocortical Lewy bodies pathology and neuroimaging studies have revealed considerable cortical grey matter reductions