Alekseichuk, Ivan

[["dc.bibliographiccitation.firstpage","509"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Brain Stimulation"],["dc.bibliographiccitation.lastpage","517"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","de Lara, Gabriel Amador"],["dc.contributor.author","Alekseichuk, Ivan"],["dc.contributor.author","Turi, Zsolt"],["dc.contributor.author","Lehr, Albert"],["dc.contributor.author","Antal, Andrea"],["dc.contributor.author","Paulus, Walter"],["dc.date.accessioned","2018-10-10T10:23:09Z"],["dc.date.available","2018-10-10T10:23:09Z"],["dc.date.issued","2018"],["dc.description.abstract","Phase-amplitude cross-frequency coupling (PAC) is characterized by the modulation of the power of a fast brain oscillation (e.g., gamma) by the phase of a slow rhythm (e.g., theta). PAC in different sub- and neocortical regions is known to underlie effective neural communication and correlates with successful long-term memory formation."],["dc.identifier.doi","10.1016/j.brs.2017.12.007"],["dc.identifier.pmid","29317186"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15940"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.relation.issn","1876-4754"],["dc.relation.issn","1935-861X"],["dc.title","Perturbation of theta-gamma coupling at the temporal lobe hinders verbal declarative memory"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1513"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Current Biology"],["dc.bibliographiccitation.lastpage","1521"],["dc.bibliographiccitation.volume","26"],["dc.contributor.author","Alekseichuk, Ivan"],["dc.contributor.author","Turi, Zsolt"],["dc.contributor.author","Amador de Lara, Gabriel"],["dc.contributor.author","Antal, Andrea"],["dc.contributor.author","Paulus, Walter J."],["dc.date.accessioned","2018-11-07T10:12:41Z"],["dc.date.available","2018-11-07T10:12:41Z"],["dc.date.issued","2016"],["dc.description.abstract","Previous, albeit correlative, findings have shown that the neural mechanisms underlying working memory critically require cross-structural and cross-frequency coupling mechanisms between theta and gamma neural oscillations. However, the direct causality between cross-frequency coupling and working memory performance remains to be demonstrated. Here we externally modulated the interaction of theta and gamma rhythms in the prefrontal cortex using novel cross-frequency protocols of transcranial alternating current stimulation to affect spatial working memory performance in humans. Enhancement of working memory performance and increase of global neocortical connectivity were observed when bursts of high gamma oscillations (80-100 Hz) coincided with the peaks of the theta waves, whereas superimposition on the trough of the theta wave and low gamma frequency protocols were ineffective. Thus, our results demonstrate the sensitivity of working memory performance and global neocortical connectivity to the phase and rhythm of the externally driven theta gamma cross-frequency synchronization."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft [SPP 1665]"],["dc.identifier.doi","10.1016/j.cub.2016.04.035"],["dc.identifier.isi","000378661800014"],["dc.identifier.pmid","27238283"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/40288"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","Najko"],["dc.relation.issn","1879-0445"],["dc.relation.issn","0960-9822"],["dc.title","Spatial Working Memory in Humans Depends on Theta and High Gamma Synchronization in the Prefrontal Cortex"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","474"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Brain Stimulation"],["dc.bibliographiccitation.lastpage","483"],["dc.bibliographiccitation.volume","13"],["dc.contributor.author","Alekseichuk, Ivan"],["dc.contributor.author","Turi, Zsolt"],["dc.contributor.author","Veit, Sibel"],["dc.contributor.author","Paulus, Walter"],["dc.date.accessioned","2020-12-10T14:22:49Z"],["dc.date.available","2020-12-10T14:22:49Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1016/j.brs.2019.12.019"],["dc.identifier.issn","1935-861X"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/71742"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Model-driven neuromodulation of the right posterior region promotes encoding of long-term memories"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e0123085"],["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","PLOS ONE"],["dc.bibliographiccitation.lastpage","17"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Pisoni, Alberto"],["dc.contributor.author","Turi, Zsolt"],["dc.contributor.author","Raithel, Almuth"],["dc.contributor.author","Ambrus, Géza Gergely"],["dc.contributor.author","Alekseichuk, Ivan"],["dc.contributor.author","Schacht, Annekathrin"],["dc.contributor.author","Paulus, Walter"],["dc.contributor.author","Antal, Andrea"],["dc.date.accessioned","2017-09-07T11:53:43Z"],["dc.date.available","2017-09-07T11:53:43Z"],["dc.date.issued","2015"],["dc.description.abstract","There is emerging evidence from imaging studies that parietal and temporal cortices act together to achieve successful recognition of declarative information; nevertheless, the precise role of these regions remains elusive. To evaluate the role of these brain areas in declarative memory retrieval, we applied bilateral tDCS, with anode over the left and cathode over the right parietal or temporal cortices separately, during the recognition phase of a verbal learning paradigm using a balanced old-new decision task. In a parallel group design, we tested three different groups of healthy adults, matched for demographic and neurocognitive status: two groups received bilateral active stimulation of either the parietal or the temporal cortex, while a third group received sham stimulation. Accuracy, discriminability index (d’) and reaction times of recognition memory performance were measurements of interest. The d’ sensitivity index and accuracy percentage improved in both active stimulation groups, as compared with the sham one, while reaction times remained unaffected. Moreover, the analysis of accuracy revealed a different effect of tDCS for old and new item recognition. While the temporal group showed enhanced performance for old item recognition, the parietal group was better at correctly recognising new ones. Our results support an active role of both of these areas in memory retrieval, possibly underpinning different stages of the recognition process."],["dc.description.sponsorship","Open-Access-Publikationsfonds 2015"],["dc.identifier.doi","10.1371/journal.pone.0123085"],["dc.identifier.gro","3151348"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11758"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/8142"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","1932-6203"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Separating Recognition Processes of Declarative Memory via Anodal tDCS: Boosting Old Item Recognition by Temporal and New Item Detection by Parietal Stimulation"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e2005867"],["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","PLoS Biology"],["dc.bibliographiccitation.lastpage","6"],["dc.bibliographiccitation.volume","16"],["dc.contributor.author","Turi, Zsolt"],["dc.contributor.author","Alekseichuk, Ivan"],["dc.contributor.author","Paulus, Walter"],["dc.date.accessioned","2018-10-10T09:45:00Z"],["dc.date.available","2018-10-10T09:45:00Z"],["dc.date.issued","2018"],["dc.description.abstract","The ability to simultaneously process and maintain multiple pieces of information is limited. Over the past 50 years, observational methods have provided a large amount of insight regarding the neural mechanisms that underpin the mental capacity that we refer to as \"working memory.\" More than 20 years ago, a neural coding scheme was proposed for working memory. As a result of technological developments, we can now not only observe but can also influence brain rhythms in humans. Building on these novel developments, we have begun to externally control brain oscillations in order to extend the limits of working memory."],["dc.identifier.doi","10.1371/journal.pbio.2005867"],["dc.identifier.pmid","29672569"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15665"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15936"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.issn","1545-7885"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","On ways to overcome the magical capacity limit of working memory"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]