The neural mechanism underlying recollection is sensitive to the quality of episodic memory: Event related potentials reveal a some-or-none threshold

Murray, Jamie G.; Howie, Catherine A.; Donaldson, David I.

doi:10.1016/j.neuroimage.2015.06.069

Cited by 37 publications

(78 citation statements)

References 62 publications

(73 reference statements)

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“…In contrast to successful versus unsuccessful retrieval, the precision with which recollected information is retrieved was tracked by activity in AnG, consistent with recent EEG evidence that the late lateral parietal ERP effect is graded according to memory precision (Murray et al, 2015). This dissociation between hippocampus and AnG is consistent with the notion of a strongly interconnected cortico-hippocampal network in which hippocampus initiates retrieval, which is then further supported by cortical regions (McClelland et al, 1995), with increasing connectivity between different nodes in the network being related to superior mnemonic performance (Wang et al, 2014).…”

Section: Discussionsupporting

confidence: 85%

“…Importantly, it is possible to separate behaviorally the probability of recollection success from the precision with which information is retrieved (Harlow and Donaldson, 2013; Harlow and Yonelinas, 2016), which can be differentially influenced by attention and retrieval practice (Fan and Turk-Browne, 2013). Furthermore, a recent EEG study supports the idea that variations in long-term memory precision may be associated with distinct neural signatures, finding the well-established left parietal old/new effect to be graded according to recollection precision (Murray et al, 2015). The observation that retrieval success and retrieval precision can be manipulated independently suggests that using continuous measures to differentiate such components will lead to a more detailed understanding of episodic memory retrieval at both behavioral and neural levels.…”

Section: Introductionmentioning

confidence: 74%

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Distinct neural mechanisms underlie the success, precision, and vividness of episodic memory

Richter

Cooper

Bays

et al. 2016

eLife

233

294

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A network of brain regions have been linked with episodic memory retrieval, but limited progress has been made in identifying the contributions of distinct parts of the network. Here, we utilized continuous measures of retrieval to dissociate three components of episodic memory: retrieval success, precision, and vividness. In the fMRI scanner, participants encoded objects that varied continuously on three features: color, orientation, and location. Participants’ memory was tested by having them recreate the appearance of the object features using a continuous dial, and continuous vividness judgments were recorded. Retrieval success, precision, and vividness were dissociable both behaviorally and neurally: successful versus unsuccessful retrieval was associated with hippocampal activity, retrieval precision scaled with activity in the angular gyrus, and vividness judgments tracked activity in the precuneus. The ability to dissociate these components of episodic memory reveals the benefit afforded by measuring memory on a continuous scale, allowing functional parcellation of the retrieval network.DOI: http://dx.doi.org/10.7554/eLife.18260.001

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Section: Discussionsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 74%

Distinct neural mechanisms underlie the success, precision, and vividness of episodic memory

Richter

Cooper

Bays

et al. 2016

eLife

233

294

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“…Moscovitch, 2008), or quantity versus quality of retrieval (cf. Murray et al, 2015). Regardless, the current data clearly demonstrates that priming can directly influence recollection.…”

Section: Accepted Manuscriptmentioning

confidence: 46%

Investigating the relationship between implicit and explicit memory: Evidence that masked repetition priming speeds the onset of recollection

Park

Donaldson

2016

NeuroImage

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Memory theories assume that unconscious processes influence conscious remembering, but the exact nature of the relationship between implicit and explicit memory remains an open question. Within the context of episodic recognition tests research typical shows that priming impacts behavioral and neural indices of familiarity. By this account, implicit memory leads to enhanced fluency of processing, which is then attributed to 'oldness' in the context of recognition judgments. Recently, however, behavioral and neuroimaging evidence has emerged to suggest that priming can also influence recollection, suggesting that the rate of recollection increases following priming. Here, we examine the relationship between priming and recollection, using Event-Related Potentials (ERPs) to assess changes in the timecourse of processing. Participants studied a series of words, and episodic memory was assessed using a standard item recognition test, but masked repetition priming preceded half of the test cues. Results confirmed that implicit memory was engaged: priming produced robust facilitation of recognition Reaction Times (RTs), with larger effects for studied than unstudied words. Mapping onto the RT data, ERPs recorded during recognition testing over centro-parietal electrodes revealed N400-like priming effects (250-500ms) that were larger in magnitude for studied than unstudied words. More importantly, priming also had a clear impact on explicit memory, as measured by recollection-related left-parietal old/new effects. While old/new effects for unprimed trials were present during the typical 500-800ms latency interval, the old/new effects seen for primed trials were equivalent in magnitude and topography, but onset ~300ms earlier. ERPs reveal that repetition priming speeds the onset of recollection, providing a novel demonstration that unconscious memory processes can have a measureable, functional, influence on conscious remembering.

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“…This approach is able to disentangle improvements in mnemonic precision and the probability that memories are retrieved (Fan and Turk-Browne 2013;Harlow and Yonelinas 2014;Sutterer and Awh 2016). Initial studies have found that these parameters are reflected by distinct neural signals (Murray et al 2015;Richter et al 2016), providing further evidence that separately modeling mnemonic precision and probability of retrieval is a meaningful distinction. Our results demonstrate that both the probability of retrieving long-term memories and the precision with which those memories are retrieved continue to improve with feedback over many repetitions.…”

Section: Discussionmentioning

confidence: 99%

Alpha-band oscillations track the retrieval of precise spatial representations from long-term memory

Sutterer

Foster

Serences

et al. 2018

Preprint

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A hallmark of episodic memory is the phenomenon of mentally re-experiencing the details of past events, and a well-established concept is that the neuronal activity that mediates encoding is reinstated at retrieval. Evidence for reinstatement has come from multiple modalities, including functional Magnetic Resonance Imaging (fMRI) and electroencephalography (EEG). These EEG studies have shed light on the time-course of reinstatement, but have been limited to distinguishing between a few categories and/or limited measures of memory strength. The goal of this work was to investigate whether recently developed experimental and technical approaches, namely an inverted encoding model applied to alpha oscillatory power in conjunction with sensitive tests of memory retrieval in a continuous space, can track and reconstruct memory retrieval of specific spatial locations. In Experiment 1, we establish that an inverted encoding model applied to multivariate alpha topography can track retrieval of precise spatial memories. In Experiment 2, we demonstrate that the pattern of multivariate alpha activity at study is similar to the pattern observed during retrieval. Finally, we observe that these encoding models predict memory retrieval behavior, including the accuracy and latency of recall. These findings highlight the broad potential for using encoding models to characterize long-term memory retrieval.

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The neural mechanism underlying recollection is sensitive to the quality of episodic memory: Event related potentials reveal a some-or-none threshold

Cited by 37 publications

References 62 publications

Distinct neural mechanisms underlie the success, precision, and vividness of episodic memory

Distinct neural mechanisms underlie the success, precision, and vividness of episodic memory

Investigating the relationship between implicit and explicit memory: Evidence that masked repetition priming speeds the onset of recollection

Alpha-band oscillations track the retrieval of precise spatial representations from long-term memory

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