• Action-associated modulation of visual event-related potentials evoked by abstract and ecological stimuli 

      Csifcsak, Gabor; Balla, Viktoria Roxana; Dalos, Vera Daniella; Kilencz, Tunde; Biro, Edit Magdolna; Urban, Gabor; Szaloki, Szilvia (Journal article; Tidsskriftartikkel, 2018-09-19)
      This study investigated the influence of action‐associated predictive processes on visual ERPs. In two experiments, we sought evidence for sensory attenuation (SA) indexed by ERP amplitude reductions for self‐induced stimuli when compared to passive viewing of the same images. We assessed if SA is (a) present for both ecological and abstract stimuli (pictures depicting hands or checkerboards), (b) ...
    • The antidepressant effect of intermittent theta burst stimulation (iTBS): study protocol for a randomized double-blind sham-controlled trial 

      Ørbo, Marte Christine; Grønli, Ole Kristian; Larsen, Camilla; Vangberg, Torgil Riise; Friborg, Oddgeir; Turi, Zsolt; Mittner, Matthias Bodo; Csifcsak, Gabor; Aslaksen, Per M (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-10-02)
      Background Intermittent theta burst stimulation (iTBS) when applied over the left dorsolateral prefrontal cortex (DLPFC) has been shown to be equally effective and safe to treat depression compared to traditional repetitive transcranial magnetic stimulation (rTMS) paradigms. This protocol describes a funded single-centre, double-blind, randomized placebo-controlled, clinical trial to investigate ...
    • Are pro-inflammatory markers associated with psychological distress in a cross-sectional study of healthy adolescents 15–17 years of age? The Fit Futures study 

      Linkas, Jonas; Ahmed, Luai A.; Csifcsak, Gabor; Emaus, Nina; Furberg, Anne-Sofie; Grimnes, Guri; Pettersen, Gunn; Rognmo, Kamilla; Christoffersen, Tore (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-15)
      Background - Inflammatory markers have been associated with depression and anxiety disorder in adolescents. Less is known about the association between inflammation and subclinical symptoms in the form of psychological distress. We investigated prevalence of psychological distress and examined the associations between common pro-inflammatory markers and psychological distress in an adolescent ...
    • Association-based Concealed Information Test: A Novel Reaction Time-Based Deception Detection Method 

      Lukacs, Gaspar; Bartosz, Gula; Szegedi-Hallgato, Emese; Csifcsak, Gabor (Journal article; Tidsskriftartikkel, 2017-07-15)
      In recent years, numerous studies were published on the reaction time (RT)-based Concealed Information Test (CIT). However, an important limitation of the CIT is the reliance on the recognition of the probe item, and therefore the limited applicability when an innocent person is aware of this item. In the present paper, we introduce an RT-based CIT that is based on item-category associations: ...
    • Blinding is compromised for transcranial direct current stimulation at 1 mA for 20 min in young healthy adults 

      Turi, Zsolt; Csifcsak, Gabor; Boayue, Nya Mehnwolo; Aslaksen, Per M; Antal, Andrea; Paulus, Walter; Groot, Josephine; Hawkins, Guy E.; Opitz, Alexander; Thielscher, Axel; Mittner, Matthias (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-03-19)
      Transcranial direct current stimulation (tDCS) is a non‐invasive brain stimulation method that is frequently used to study cortical excitability changes and their impact on cognitive functions in humans. While most stimulators are capable of operating in double‐blind mode, the amount of discomfort experienced during tDCS may break blinding. Therefore, specifically designed sham stimulation protocols ...
    • C-Reactive Protein and TGF-α Predict Psychological Distress at Two Years of Follow-Up in Healthy Adolescent Boys: The Fit Futures Study 

      Linkas, Jonas; Ahmed, Luai A.; Csifcsak, Gabor; Emaus, Nina; Furberg, Anne-Sofie; Grimnes, Guri; Pettersen, Gunn; Rognmo, Kamilla; Christoffersen, Tore (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-03-11)
      Objective: The scarcity of research on associations between inflammatory markers and symptoms of depression and anxiety during adolescence has yielded inconsistent results. Further, not all studies have controlled for potential confounders. We explored the associations between baseline inflammatory markers and psychological distress including moderators at follow-up in a Norwegian adolescent population ...
    • The effect of transcranial direct current stimulation on the interplay between executive control, behavioral variability and mind wandering: A registered report 

      Alexandersen, Andreas; Mittner, Matthias; Csifcsak, Gabor; Groot, Josephine Maria (Journal article; Tidsskriftartikkel; Peer reviewed, 2022-06-11)
      Mind wandering (MW) is a mental phenomenon humans experience daily. Yet, we lack a complete understanding of the neural basis of this pervasive mental state. Over the past decade there has been an increase in publications using transcranial direct current stimulation (tDCS) to modulate the propensity to mind wander, but findings are diverse, and a satisfactory conclusion is missing. Recently, Boayue ...
    • Effects of transcranial direct current stimulation for treating depression: A modeling study 

      Csifcsak, Gabor; Boayue, Nya Mehnwolo; Puonti, Oula; Thielscher, Axel; Mittner, Matthias (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-02-28)
      <p><i>Background</i>: Transcranial direct current stimulation (tDCS) above the left dorsolateral prefrontal cortex (lDLPFC) has been widely used to improve symptoms of major depressive disorder (MDD). However, the effects of different stimulation protocols in the entire frontal lobe have not been investigated in a large sample including patient data.</p> <p><i>Methods</i>: We used 38 head ...
    • The first independent study on the complex trial protocol version of the P300-based concealed information test: Corroboration of previous findings and highlights on vulnerabilities 

      Lukacs, Gaspar; Weiss, Bela; Dalos, Vera Daniella; Kilencz, Tunde; Tudja, Szabina; Csifcsak, Gabor (Journal article; Tidsskriftartikkel; Peer reviewed, 2016-10-15)
      More than a dozen studies of the Complex Trial Protocol (CTP) version of the P300-based Concealed Information Test have been published since its introduction (Rosenfeld et al., 2008), and it has been fairly consistently proven to provide high accuracy and strong resistance to countermeasures (Rosenfeld et al., 2013). However, no independent authors have verified these findings until now. In the ...
    • Head models of healthy and depressed adults for simulating the electric fields of non-invasive electric brain stimulation [version 2; referees: 2 approved] 

      Boayue, Nya Mehnwolo; Csifcsak, Gabor; Puonti, Oula; Thielscher, Axel; Mittner, Matthias (Journal article; Tidsskriftartikkel; Peer reviewed, 2018-06-06)
      During the past decade, it became clear that the electric field elicited by non-invasive brain stimulation (NIBS) techniques such as transcranial direct current stimulation (tDCS) and transcranial magnetic stimulation (TMS) are substantially influenced by variations in individual head and brain anatomy. In addition to structural variations in the healthy, several psychiatric disorders are characterized ...
    • High-Definition Transcranial Direct Current Stimulation Improves Delayed Memory in Alzheimer’s Disease Patients: A Pilot Study Using Computational Modeling to Optimize Electrode Position 

      Rasmussen, Ingrid Daae; Boayue, Nya Mehnwolo; Mittner, Matthias; Bystad, Martin Kragnes; Grønli, Ole Kristian; Vangberg, Torgil Riise; Csifcsak, Gabor; Aslaksen, Per M. (Journal article; Tidsskriftartikkel; Peer reviewed, 2021-09-14)
      Background: The optimal stimulation parameters when using transcranial direct current stimulation (tDCS) to improve memory performance in patients with Alzheimer’s disease (AD) are lacking. In healthy individuals, inter-individual differences in brain anatomy significantly influence current distribution during tDCS, an effect that might be aggravated by variations in cortical atrophy in AD ...
    • Increasing propensity to mind‐wander by transcranial direct current stimulation? A registered report 

      Boayue, Nya Mehnwolo; Csifcsak, Gabor; Aslaksen, Per M; Turi, Zsolt; Antal, Andrea; Groot, Josephine Maria; Hawkins, Guy E.; Forstmann, Birte U.; Opitz, Alexander; Thielscher, Axel; Mittner, Matthias (Journal article; Tidsskriftartikkel, 2019-01-24)
      Transcranial direct current stimulation (tDCS) has been proposed to be able to modulate different cognitive functions. However, recent meta‐analyses conclude that its efficacy is still in question. Recently, an increase in subjects’ propensity to mind‐wander has been reported as a consequence of anodal stimulation of the left dorsolateral prefrontal cortex (Axelrod et al., Proceedings of the National ...
    • Intermittent Absence of Control during Reinforcement Learning Interferes with Pavlovian Bias in Action Selection 

      Csifcsak, Gabor; Melsæter, Eirik; Mittner, Matthias (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-03-02)
      The ability to control the occurrence of rewarding and punishing events is crucial for our well-being. Two ways to optimize performance are to follow heuristics like Pavlovian biases to approach reward and avoid loss or to rely more on slowly accumulated stimulus–action associations. Although reduced control over outcomes has been linked to suboptimal decision-making in clinical conditions associated ...
    • The interplay between executive control, behavioral variability and mind wandering: Insights from a high-definition transcranial direct-current stimulation study 

      Boayue, Nya Mehnwolo; Csifcsak, Gabor; Kreis, Isabel Viola; Schmidt, Carole; Finn, Iselin Caroline; Vollsund, Anna Elfrida Hovde; Mittner, Matthias (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-11-21)
      While the involvement of executive processes in mind wandering is largely undebated, their exact relationship is subject to an ongoing debate and rarely studied dynamically within‐subject. Several brain‐stimulation studies using transcranial direct current stimulation (tDCS) have attempted to modulate mind‐wandering propensity by stimulating the left dorsolateral prefrontal cortex (DLPFC) which is ...
    • Linking brain networks and behavioral variability to different types of mind-wandering 

      Csifcsak, Gabor; Mittner, Matthias (Others; Andre, 2017-07-13)
    • Mild Effect of Nalmefene on Alcoholic Cue-Induced Response Invigoration in Alcohol Use Disorder Without Accompanying Changes in Electrophysiological Signatures of Early Visual Processing and Executive Control 

      Gál, Bernadett Ildikó; Kilencz, Tunde; Albert, Anita; Demeter, Ildikó; Hegedűs, Klára Mária; Janka, Zoltán; Csifcsak, Gabor; Álmos, Péter Zoltán (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-09-26)
      Nalmefene is approved for as-needed pharmacological treatment in alcohol use disorder (AUD) by the European Medicines Agency. While the cellular effects of nalmefene have been thoroughly investigated, data are very limited on how this agent influences neural signals associated with inhibitory control and the visual analysis of environmental cues. This double-blind crossover study assessed the ...
    • Modulation of mind wandering using transcranial direct current stimulation: A meta-analysis based on electric field modeling 

      Nawani, Hema; Mittner, Matthias Bodo; Csifcsak, Gabor (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-23)
      Mind wandering (MW) is a heterogeneous construct involving task-unrelated thoughts. Recently, the interest in modulating MW propensity via non-invasive brain stimulation techniques has increased. Single-session transcranial direct current stimulation (tDCS) in healthy controls has led to mixed results in modulating MW propensity, possibly due to methodological heterogeneity. Therefore, our aim was ...
    • Newborn Behavioral Observation, maternal stress, depressive symptoms and the mother-infant relationship: results from the Northern Babies Longitudinal Study (NorBaby) 

      Høifødt, Ragnhild Sørensen; Nordahl, Dag; Landsem, Inger Pauline; Csifcsak, Gabor; Bohne, Agnes; Pfuhl, Gerit; Rognmo, Kamilla; Braarud, Hanne Cecilie; Goksøyr, Arnold Mikal; Moe, Vibeke; Slinning, Kari; Wang, Catharina Elisabeth Arfwedson (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-06-15)
      <i>Background</i> - Families can experience the postpartum period as overwhelming and many report a special need for support. The Newborn Behavioral Observation (NBO) aims to promote a positive parent-infant relationship by sensitising parents to the infant’s signals. This article evaluates the NBO as a universal preventive intervention within the regular well-baby clinic service on measures of ...
    • A novel experimental paradigm with improved ecological validity reveals robust action-associated enhancement of the N1 visual event-related potential in healthy adults 

      Balla, Viktória Roxána; Szalóki, Szilvia; Kilencz, Tünde; Dalos, Vera Daniella; Németh, Roland; Csifcsak, Gabor (Journal article; Tidsskriftartikkel; Peer reviewed, 2019-11-11)
      The association between an action and its sensory consequence has been linked to our sense of agency (SoA). While ecological validity is crucial in investigating such a complex phenomenon, previous paradigms focusing on the cortical analysis of movement-related images used simplified experimental protocols. Here, we examined the influence of action-associated predictive processes on visual event-related ...
    • Probing the neural signature of mind wandering with simultaneous fMRI-EEG and pupillometry 

      Groot, Josephine Maria; Boayue, Nya Mehnwolo; Csifcsak, Gabor; Boekel, Wouter; Huster, Rene; Forstmann, Birte U; Mittner, Matthias (Journal article; Tidsskriftartikkel; Peer reviewed, 2020-10-01)
      Mind wandering reflects the shift in attentional focus from task-related cognition driven by external stimuli toward self-generated and internally-oriented thought processes. Although such task-unrelated thoughts (TUTs) are pervasive and detrimental to task performance, their underlying neural mechanisms are only modestly understood. To investigate TUTs with high spatial and temporal precision, we ...