Does lateral parietal cortex support episodic memory?

Davidson, Patrick S. R.; Anaki, David; Ciaramelli, Elisa; Cohn, Mélanie; Kim, Alice S. N.; Murphy, Kelly J.; Troyer, Angela K.; Moscovitch, Morris; Levine, Brian

doi:10.1016/j.neuropsychologia.2008.01.011

Cited by 187 publications

(221 citation statements)

References 106 publications

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“…This is consistent with neuropsychological studies showing that patients with parietal lesions reported ABMs that lacked episodic richness (Berryhill et al, 2007;Davidson et al, 2008). With regard to the role of the parietal cortex in episodic memory, the current findings can be interpreted in light of the dual attentional processes hypothesis (Cabeza, 2008;Ciaramelli et al, 2008), which distinguishes between the role of dorsal and ventral parietal regions.…”

Section: Neuropsychological Predictors Of the Proportion Of Internal supporting

confidence: 91%

Episodic autobiographical memory in amnestic mild cognitive impairment: What are the neural correlates?

Bastin¹,

Feyers²,

Jedidi³

et al. 2012

Human Brain Mapping

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Autobiographical memory in amnestic Mild Cognitive Impairment (aMCI) is characterized by impaired retrieval of episodic memories, but relatively preserved personal semantic knowledge.This study aimed to identify (via FDG-PET) the neural substrates of impaired episodic specificity of autobiographical memories in 35 aMCI patients compared with 24 healthy elderly controls.Significant correlations between regional cerebral activity and the proportion of episodic details in autobiographical memories from two life periods were found in specific regions of an autobiographical brain network. In aMCI patients, more than in controls, specifically episodic memories from early adulthood were associated with metabolic activity in the cuneus and in parietal regions. We hypothesized that variable retrieval of episodic autobiographical memories in our aMCI patients would be related to their variable capacity to reactivate specific sensoryperceptual and contextual details of early adulthood events linked to reduced (occipito-parietal) visual imagery and less efficient (parietal) attentional processes. For recent memories (last year), a correlation emerged between the proportion of episodic details and activity in lateral temporal regions and the temporo-parietal junction. Accordingly, variable episodic memory for recent events may be related to the efficiency of controlled search through general events likely to provide cues for the retrieval of episodic details and to the ability to establish a self perspective favouring recollection.

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Section: Neuropsychological Predictors Of the Proportion Of Internal supporting

confidence: 91%

Episodic autobiographical memory in amnestic mild cognitive impairment: What are the neural correlates?

Bastin¹,

Feyers²,

Jedidi³

et al. 2012

Human Brain Mapping

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“…However, this latter hypothesis does not clearly account for the results of meta-analyses showing that, within the parietal lobe, familiarity is preferentially associated with the superior parietal cortex whereas recollection is preferentially associated with the inferior parietal cortex (Kim, 2010;Skinner and Fernandes, 2007). It has recently been proposed that the parietal lobe supports the subjective experience of recollection or a similar aspect of recollection, the feeling of confidence (Ally et al, 2008;Berryhill et al, 2007;Davidson et al, 2008;Hayes et al, 2011;Slotnick, 2010). Simons et al (2010) reported that patients with bilateral parietal lesions have impaired subjective recollection but preserved bottom-up attention processes during memory tasks.…”

Section: Functional Connectivity During Associative Cermentioning

confidence: 98%

Item familiarity and controlled associative retrieval in Alzheimer's disease: An fMRI study

Genon

Collette

Feyers

et al. 2013

Cortex

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Typical Alzheimer's disease (AD) is characterized by an impaired form of associative memory, recollection, that includes the controlled retrieval of associations. In contrast, familiarity-based memory for individual items may sometimes be preserved in the early stages of the disease. This is the first study that directly examines whole brain regional activity during one core aspect of the recollection function: associative controlled episodic retrieval (CER), contrasted to item familiarity in AD patients. Cerebral activity related to associative CER and item familiarity in AD patients and healthy controls (HC) was measured with functional magnetic resonance imaging during a word-pair recognition task to which the process dissociation procedure was applied. Some patients had null CER estimates (AD-), whereas others did show some CER abilities (AD+), although significantly less than HC. In contrast, familiarity estimates were equivalent in the three groups. In AD+, as in controls, associative CER activated the inferior precuneus/posterior cingulate cortex (PCC). When performing group comparisons, no region was found to be significantly more activated during CER in HC than AD+ and vice versa. However, during associative CER, functional connectivity between this region and the hippocampus, the inferior parietal and dorsolateral prefrontal cortex (DLPFC) was significantly higher in HC than in AD+. In all three groups, item familiarity was related to activation along the intraparietal sulcus (IPS). In conclusion, whereas the preserved automatic detection of an old item (without retrieval of accurate word association) is related to parietal activation centred on the IPS, the inferior precuneus/PCC supports associative CER ability in AD patients, as in HC. However, AD patients have deficient functional connectivity during associative CER, suggesting that the residual recollection function in these patients might be impoverished by the lack of some recollection-related aspects such as autonoetic quality, episodic details and verification.

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“…Recently, memory researchers have also turned their attention to the role of PPC in cognition because human neuroimaging experiments have consistently revealed PPC activity during episodic retrieval (Wheeler and Buckner 2004;Wagner et al 2005;Cabeza et al 2008;Ciaramelli et al 2008;Vilberg and Rugg 2008b;Olson and Berryhill 2009). Moreover, studies of human patients with lesions to PPC have revealed subtle, but significant, memory impairments (Berryhill et al 2007;Davidson et al 2008;Berryhill et al 2010;Ciaramelli et al 2010;Drowos et al 2010; Simons et al 2010, cf. Ally et al 2008;Haramati et al 2008;Simons et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Functional Heterogeneity in Posterior Parietal Cortex Across Attention and Episodic Memory Retrieval

et al. 2012

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While attention is critical for event memory, debate has arisen regarding the extent to which posterior parietal cortex (PPC) activation during episodic retrieval reflects engagement of PPCmediated mechanisms of attention. Here, we directly examined the relationship between attention and memory, within and across subjects, using functional magnetic resonance imaging attentionmapping and episodic retrieval paradigms. During retrieval, 4 functionally dissociable PPC regions were identified. Specifically, 2 PPC regions positively tracked retrieval outcomes: lateral intraparietal sulcus (latIPS) indexed graded item memory strength, whereas angular gyrus (AnG) tracked recollection. By contrast, 2 other PPC regions demonstrated nonmonotonic relationships with retrieval: superior parietal lobule (SPL) tracked retrieval reaction time, consistent with a graded engagement of top-down attention, whereas temporoparietal junction displayed a complex pattern of belowbaseline retrieval activity, perhaps reflecting disengagement of bottom-up attention. Analyses of retrieval effects in PPC topographic spatial attention maps (IPS0-IPS5; SPL1) revealed that IPS5 and SPL1 exhibited a nonmonotonic relationship with retrieval outcomes resembling that in the SPL region, further suggesting that SPL activation during retrieval reflects top-down attention. While demands on PPC attention mechanisms vary during retrieval attempts, the present functional parcellation of PPC indicates that 2 additional mechanisms (mediated by latIPS and AnG) positively track retrieval outcomes.

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Does lateral parietal cortex support episodic memory?

Cited by 187 publications

References 106 publications

Episodic autobiographical memory in amnestic mild cognitive impairment: What are the neural correlates?

Episodic autobiographical memory in amnestic mild cognitive impairment: What are the neural correlates?

Item familiarity and controlled associative retrieval in Alzheimer's disease: An fMRI study

Functional Heterogeneity in Posterior Parietal Cortex Across Attention and Episodic Memory Retrieval

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