The Time Course of Ventrolateral Prefrontal Cortex Involvement in Memory Formation

Machizawa, Maro G.; Kalla, Roger; Walsh, Vincent; Otten, Leun J.

doi:10.1152/jn.90937.2008

Cited by 27 publications

(37 citation statements)

References 66 publications

(147 reference statements)

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“…Taken together, the studies by Machizawa et al (2010) and Rossi et al (2011) have provided evidence that post-stimulus brain activity plays a role in memory formation.…”

Section: Introductionmentioning

confidence: 77%

“…Several event-related functional magnetic resonance imaging (fMRI) and electroencephalographic (EEG) studies used this approach to reveal the network of brain regions implicated in successful memory formation (for early reviews, Friedman & Johnson, 2000;Paller & Wagner, 2002). More recently, non-invasive brain stimulation techniques (transcranial magnetic stimulation, TMS; transcranial direct current stimulation, tDCS) added to this literature by showing that the stimulation of selected regions of the prefrontal cortex during memory encoding affected later retrieval (Rossi et al, 2001(Rossi et al, , 2004(Rossi et al, , 2006(Rossi et al, , 2011Köhler, Paus, Buckner & Milner, 2004;Machizawa, Kalla, Walsh & Otten, 2010;Blumenfeld, Lee & D'Esposito, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Two TMS studies investigated the temporal dynamics of memory formation including a post-stimulus time interval. Machizawa et al (2010) delivered double-pulse TMS to the ventrolateral prefrontal cortex (VLPFC) 350, 750 and 1150 ms after the onset of a onesecond word, and found that the three stimulation times equally decreased subsequent memory performance compared to a control condition. Rossi et al (2011) instead used a repetitive TMS (rTMS) approach and longer stimulation intervals.…”

Section: Introductionmentioning

confidence: 99%

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Dynamic changes in prefrontal cortex involvement during verbal episodic memory formation

Galli

Feurra

Pavone

et al. 2017

Biological Psychology

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Highlights We investigated encoding-related post-stimulus brain activity in the prefrontal cortex with repetitive Transcranial Magnetic Stimulation (r-TMS)  We delivered r-TMS during encoding while a word appeared on the screen, and at different points in time after its offset  r-TMS over the ventrolateral prefrontal cortex shortly after stimulus offset decreased subsequent memory accuracy  No effects were found when r-TMS was delivered over the dorsolateral prefrontal cortex at any time point  The involvement of the ventrolateral prefrontal cortex may reflect offset-specific processes. ABSTRACTDuring encoding, the neural activity immediately before or during an event can predict whether that event will be later remembered. The contribution of brain activity immediately after an event to memory formation is however less known. Here, we used repetitive Transcranial Magnetic Stimulation (rTMS) to investigate the temporal dynamics of episodic memory encoding with a focus on post-stimulus time intervals. At encoding, rTMS was applied during the online processing of the word, at its offset, or 100, 200, 300 or 400 ms thereafter. rTMS was delivered to the left ventrolateral (VLPFC) or dorsolateral prefrontal cortex (DLPFC). VLPFC rTMS during the first few hundreds of milliseconds after word offset disrupted subsequent recognition accuracy. We did not observe effects of DLPFC rTMS at any time point. These results suggest that verbal encoding-related VLPFC engagement starts at a relatively late processing stage, and may reflect brain processes related to the offset of the stimulus.3

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“…Taken together, the studies by Machizawa et al (2010) and Rossi et al (2011) have provided evidence that post-stimulus brain activity plays a role in memory formation.…”

Section: Introductionmentioning

confidence: 77%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Dynamic changes in prefrontal cortex involvement during verbal episodic memory formation

Galli

Feurra

Pavone

et al. 2017

Biological Psychology

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“…This has been consistently demonstrated using various types of stimulation pulses (rTMS, single pulse, pairedpulses) and memory items (word, picture) (Blumenfeld, Lee, & D'Esposito, 2014;Gagnon, Blanchet, Grondin, & Schneider, 2010;Kahn et al, 2005;Machizawa, Kalla, Walsh, & Otten, 2010;Rossi et al, 2001;Sandrini, 2003;Skrdlantová, Horácek, Dockery, Lukavský, & al, 2005).…”

Section: Left Prefrontal Cortex Stimulationmentioning

confidence: 86%

A network approach for modulating memory processes via direct and indirect brain stimulation: Toward a causal approach for the neural basis of memory

Kim¹,

Ekstrom

Tandon³

2016

Neurobiology of Learning and Memory

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A network approach for modulating memory processes via direct and indirect brain stimulation: Toward a causal approach for the neural basis of memory This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. that disrupting frontal or parietal regions also impairs memory performance, suggesting that these regions also play necessary roles in declarative memory. On the other hand, a handful of both invasive and non-invasive studies have also suggested modest improvements in memory performance following stimulation. These studies typically target brain regions connected to the hippocampus or other memory "hubs," which may affect endogenous activity in connected areas like the hippocampus, suggesting that to augment declarative memory, altering the broader endogenous memory network activity is critical. Together, studies reporting memory improvements / impairments are consistent with the idea that a network of distinct brain "hubs" may be crucial for successful memory encoding and retrieval rather than a single primary hub such as the hippocampus. Thus, it is important to consider neurostimulation from the network perspective, rather than from a purely localizationalist viewpoint. We conclude by proposing a novel approach to neurostimulation for declarative memory modulation that aims to facilitate interactions between multiple brain "nodes" underlying memory rather than considering individual brain regions in isolation.

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“…Studies in PFC lesion patients have reported impaired performance in free recall (29)(30)(31)(32) and in complex memory tasks like source memory (33) or associative learning (34)(35)(36), but recognition memory impairment after PFC lesions or VLPFC transcranial magnetic stimulation is modest (32,37). These impairments have been attributed to deficits in cognitive control of information selection and organization rather than a primary memory deficit (7).…”

Section: Discussionmentioning

confidence: 99%

Fiber density between rhinal cortex and activated ventrolateral prefrontal regions predicts episodic memory performance in humans

Schott

Niklas²,

Kaufmann³

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

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The prefrontal cortex (PFC) is assumed to contribute to goaldirected episodic encoding by exerting cognitive control on medial temporal lobe (MTL) memory processes. However, it is thus far unclear to what extent the contribution of PFC-MTL interactions to memory manifests at a structural anatomical level. We combined functional magnetic resonance imaging and fiber tracking based on diffusion tensor imaging in 28 young, healthy adults to quantify the density of white matter tracts between PFC regions that were activated during the encoding period of a verbal free-recall task and MTL subregions. Across the cohort, the strength of fiber bundles linking activated ventrolateral PFC regions and the rhinal cortex (comprising the peri-and entorhinal cortices) of the MTL correlated positively with free-recall performance. These direct white matter connections provide a basis through which activated regions in the PFC can interact with the MTL and contribute to interindividual differences in human episodic memory.functional MRI | tractography | hippocampus | perirhinal cortex | entorhinal cortex E pisodic memory (1) is the ability to encode, store, and recall events in their spatial and temporal context. Human lesion studies (2, 3) have demonstrated that episodic memory function is critically dependent on the hippocampus and neighboring structures of the medial temporal lobe (MTL), and functional neuroimaging experiments have shown that episodic memory encoding is associated with activations of the MTL and regions of the prefrontal cortex (PFC) (1, 4, 5).During encoding, both MTL and PFC regions show stronger activity for items that are later recalled compared with items that are forgotten [difference because of memory (DM)] (for reviews see refs. 6 and 7). It had long been hypothesized that coactivation of PFC and MTL structures might indicate that both regions cooperate during encoding and that activated PFC regions might be anatomically connected to MTL structures by white matter tracts (8). Via these fiber tracts, PFC regions might exert top-down control on MTL structures (9, 10) that act as gateways to the hippocampus, most notably the entrorhinal and perirhinal cortices (ERC and PRC, respectively, jointly referred to as the rhinal cortex) (7).Although intriguing, the possibility of a direct anatomically based functional interaction between PFC regions and the ERC and PRC during successful encoding is not without doubt. Activity patterns that reflect successful encoding in functional MRI (fMRI) studies are most frequently observed in the ventrolateral and dorsolateral PFC (VLPFC and DLPFC, respectively) (6, 7). However, studies in nonhuman primates suggest that the strongest PFC projections to the ERC and PRC arise in the orbitofrontal cortex (11-13). In contrast, structural connectivity between DLPFC/VLPFC and the MTL is light (10-13). Therefore, the question whether prefrontal areas that show encoding-related activity patterns are connected with the ERC and PRC is particularly relevant in humans.Diffusion tensor im...

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The Time Course of Ventrolateral Prefrontal Cortex Involvement in Memory Formation

Cited by 27 publications

References 66 publications

Dynamic changes in prefrontal cortex involvement during verbal episodic memory formation

Dynamic changes in prefrontal cortex involvement during verbal episodic memory formation

A network approach for modulating memory processes via direct and indirect brain stimulation: Toward a causal approach for the neural basis of memory

Fiber density between rhinal cortex and activated ventrolateral prefrontal regions predicts episodic memory performance in humans

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