Lehr, Albert

[["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","ENEURO.0126-20.2020"],["dc.bibliographiccitation.issue","5"],["dc.bibliographiccitation.journal","eneuro"],["dc.bibliographiccitation.volume","7"],["dc.contributor.author","Turi, Zsolt"],["dc.contributor.author","Mittner, Matthias"],["dc.contributor.author","Lehr, Albert"],["dc.contributor.author","Bürger, Hannah"],["dc.contributor.author","Antal, Andrea"],["dc.contributor.author","Paulus, Walter"],["dc.date.accessioned","2021-04-14T08:32:42Z"],["dc.date.available","2021-04-14T08:32:42Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1523/ENEURO.0126-20.2020"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/17492"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/83993"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.notes.intern","Merged from goescholar"],["dc.relation.eissn","2373-2822"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","θ-γ Cross-Frequency Transcranial Alternating Current Stimulation over the Trough Impairs Cognitive Control"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","e0266107"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","PLoS One"],["dc.bibliographiccitation.volume","17"],["dc.contributor.author","Mohd Zulkifly, Mohd Faizal"],["dc.contributor.author","Lehr, Albert"],["dc.contributor.author","van de Velden, Daniel"],["dc.contributor.author","Khan, Asad"],["dc.contributor.author","Focke, Niels K."],["dc.contributor.author","Wolters, Carsten H."],["dc.contributor.author","Paulus, Walter"],["dc.contributor.editor","Schwenkreis, Peter"],["dc.date.accessioned","2022-04-01T10:02:01Z"],["dc.date.available","2022-04-01T10:02:01Z"],["dc.date.issued","2022"],["dc.description.abstract","Interindividual anatomical differences in the human cortex can lead to suboptimal current directions and may result in response variability of transcranial electrical stimulation methods. These differences in brain anatomy require individualized electrode stimulation montages to induce an optimal current density in the targeted area of each individual subject. We aimed to explore the possible modulatory effects of 140 Hz transcranial alternating current stimulation (tACS) on the somatosensory cortex using personalized multi-electrode stimulation montages. In two randomized experiments using either tactile finger or median nerve stimulation, we measured by evoked potentials the plasticity aftereffects and oscillatory power changes after 140 Hz tACS at 1.0 mA as compared to sham stimulation (n = 17, male = 9). We found a decrease in the power of oscillatory mu-rhythms during and immediately after tactile discrimination tasks, indicating an engagement of the somatosensory system during stimulus encoding. On a group level both the oscillatory power and the evoked potential amplitudes were not modulated by tACS neither after tactile finger stimulation nor after median nerve stimulation as compared to sham stimulation. On an individual level we could however demonstrate that lower angular difference (i.e., differences between the injected current vector in the target region and the source orientation vector) is associated with significantly higher changes in both P20/N20 and N30/P30 source activities. Our findings suggest that the higher the directionality of the injected current correlates to the dipole orientation the greater the tACS-induced aftereffects are."],["dc.identifier.doi","10.1371/journal.pone.0266107"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/105804"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-530"],["dc.relation.eissn","1932-6203"],["dc.rights.uri","http://creativecommons.org/licenses/by/4.0/"],["dc.title","Directionality of the injected current targeting the P20/N20 source determines the efficacy of 140 Hz transcranial alternating current stimulation (tACS)-induced aftereffects in the somatosensory cortex"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.journal","Neural Plasticity"],["dc.bibliographiccitation.lastpage","13"],["dc.bibliographiccitation.volume","2019"],["dc.contributor.author","Lehr, Albert"],["dc.contributor.author","Henneberg, Niklas"],["dc.contributor.author","Nigam, Tarana"],["dc.contributor.author","Paulus, Walter"],["dc.contributor.author","Antal, Andrea"],["dc.date.accessioned","2019-07-15T10:35:13Z"],["dc.date.available","2019-07-15T10:35:13Z"],["dc.date.issued","2019"],["dc.description.abstract","Behavioral response conflict arises in the color-word Stroop task and triggers the cognitive control network. Midfrontal theta-band oscillations correlate with adaptive control mechanisms during and after conflict resolution. In order to prove causality, in two experiments, we applied transcranial alternating current stimulation (tACS) at 6 Hz to the dorsolateral prefrontal cortex (DLPFC) during Stroop task performance. Sham stimulation served as a control in both experiments; 9.7 Hz tACS served as a nonharmonic alpha band control in the second experiment. We employed generalized linear mixed models for analysis of behavioral data. Accuracy remained unchanged by any type of active stimulation. Over both experiments, the Stroop effect (response time difference between congruent and incongruent trials) was reduced by 6 Hz stimulation as compared to sham, mainly in trials without prior conflict adaptation. Alpha tACS did not modify the Stroop effect. Theta tACS can both reduce the Stroop effect and modulate adaptive mechanisms of the cognitive control network, suggesting midfrontal theta oscillations as causally involved in cognitive control."],["dc.identifier.doi","10.1155/2019/6747049"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16280"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/61498"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation.issn","2090-5904"],["dc.relation.issn","1687-5443"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Modulation of Conflict Processing by Theta-Range tACS over the Dorsolateral Prefrontal Cortex"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]