Rapid CommunicationThe Neural Basis of Intrusions in Free Recall and Cued Recall: A PET Study in Alzheimer's Disease
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Neuroimaging correlates of false memory in 'Alzheimer's disease: A preliminary systematic review
2020, Psychiatry Research - NeuroimagingCitation Excerpt :Neuroimaging studies that have investigated false memory in non-AD populations have shown reduced MTL activity and increased PFC activity (including right dorsolateral PFC and anterior cingulate) during retrieval of false versus true memories (see Dennis et al. (2015)). The finding of reduced metabolism and connectivity of PFC regions in those with false memory (Desgranges et al., 2002; Venneri et al., 2017) superficially conflicts with the evidence base, but changes due to age-related structural and functional decline may be relevant here. Older adults similarly show reduced MTL function in false memory, with a more mixed picture of PFC involvement (see Devitt and Schacter (2016)).
Classification of patients with MCI and AD from healthy controls using directed graph measures of resting-state fMRI
2017, Behavioural Brain ResearchEpisodic memory in normal aging and Alzheimer disease: Insights from imaging and behavioral studies
2015, Ageing Research ReviewsCitation Excerpt :More recently, however, researchers have turned to the so-called “positive” symptoms, such as extra-list intrusions, which are the production of words that do not belong to the presented list in a recall task, and false recognition, which occurs when a subject is convinced that he or she recognizes an item even though it was not previously presented in the recognition task (Adam, 2006). Desgranges et al. (2002) suggested that different intrusions may arise via different processes: free recall intrusions that lack any semantic link to the target words may be attributed to deficits in strategic processes, reflecting a frontal dysfunction, whereas cued recall intrusions are induced relatively automatically by indices, reflecting rhinal dysfunction (Ergis and Eusop-Roussel, 2008). Several studies showed that AD patients had a generally positive response bias (i.e., a tendency to always say “yes, I have seen this item”) in recognition tests (Pillon et al., 1993; Snodgrass and Corwin, 1988).
Identifying patients with Alzheimer's disease using resting-state fMRI and graph theory
2015, Clinical NeurophysiologyCitation Excerpt :These correlations are between dorsolateral of the left superior frontal gyrus and left middle frontal gyrus (SFGdor.L and MFG.L), dorsolateral of the right superior frontal gyrus and right middle frontal gyrus (SFGdor.R and MFG.R), orbital part of the left superior frontal gyrus and orbital part of the left middle frontal gyrus (ORBsup.L and ORBmid.L), and medial orbital of the left superior frontal gyrus and medial orbital of the right superior frontal gyrus (ORBsupmed.L and ORBsupmed.R). These results are consistent with previous studies which reported significant changes in the middle occipital gyrus (Smith et al., 2009), inferior occipital gyrus (Melrose et al., 2009), lingual gyrus (Eustache et al., 2004), and superior frontal gyrus (Desgranges et al., 2002). After statistical analysis of functional connectivity in the brain, we hypothesized to use brain network measures as discriminative features for automatically classifying patients with AD from healthy control subjects.