Publications

Jan Weber, A. Solbakk, A. Blenkmann, A. Llores, A. Funderud, S. Leske, P. Larsson, J, Ivanovic, R. Knight, T. Endestad, Randolph Helfrich (2024). Population coding and oscillatory subspace synchronization integrate context into actions. Nature Communications.

Isabel Raposo, S. Szczepanski, K. Haaland, T. Endestad, A. Solbakk, R. Knight, Randolph Helfrich (2023). Periodic neglect after frontoparietal lesions provides causal evidence for rhythmic attention sampling. Current Biology.

Randolph Helfrich, R. Knight (2023). Neural Recordings and Time Series Analyses. The SAGE Handbook of Cognitive and Systems Neuroscience.

Janna Lendner, Randolph Helfrich (2023). How can I run sleep and anesthesia studies with intracranial EEG?. Intracranial EEG for Cognitive Neuroscience.

Jan Weber, Gabriela Iwama, A. Solbakk, A. Blenkmann, P. Larsson, J. Ivanovic, R. Knight, T. Endestad, Randolph Helfrich (2023). Subspace partitioning in human prefrontal cortex resolves cognitive interference. PNAS.

Frank van Schalkwijk, Jan Weber, Michael Hahn, Janna Lendner, M. Inostroza, J. Lin, Randolph Helfrich (2023). An evolutionary conserved division-of-labor between hippocampal and neocortical sharp-wave ripples organizes information transfer during sleep. Progress in Neurobiology.

Randolph Helfrich, R. Knight, M. D'Esposito (2022). Methods to Study Human Memory. Oxford Handbook of Human Memory.

Randolph Helfrich, R. Knight (2022). Neural recordings and time series analyses. The SAGE Handbook of Cognitive and Systems Neuroscience.

Randolph Helfrich, R. Knight (2022). Making memories last: How sleep promotes neuroplasticity. Changing Brains: Essays on Neuroplasticity in Honor of Helen J. Neville.

Randolph Helfrich (2022). Human Intracranial Cognitive Neurophysiology. Electrophysiological Recording Techniques, Neuromethods.

Michael Hahn, K. Bothe, D. Heib, M. Schabus, Randolph Helfrich, K. Hoedlmoser (2022). Slow oscillation–spindle coupling strength predicts real-life gross-motor learning in adolescents and adults. eLife.

Randolph Helfrich, Janna Lendner, R. Knight (2021). Aperiodic sleep networks promote memory consolidation. Trends in Cognitive Sciences.

J. Kam, Randolph Helfrich, A. Sobbak, T. Endestad, P. Larsson, J. Lin, R. Knight (2021). Top–Down Attentional Modulation in Human Frontal Cortex: Differential Engagement during External and Internal Attention. Cerebral Cortex.

Janna Lendner, Randolph Helfrich, B. Mander, L. Romundstad, J. Lin, M. Walker, P. Larsson, R. Knight (2020). An electrophysiological marker of arousal level in humans. eLife.

Michael Hahn, D. Heib, M. Schabus, K. Hoedlmoser, Randolph Helfrich (2020). Slow oscillation-spindle coupling predicts enhanced memory formation from childhood to adolescence. eLife.

Randolph Helfrich, R. Knight (2019). Cognitive neurophysiology: Event-related potentials. Handbook of Clinical Neurology.

Randolph Helfrich, R. Knight (2019). Cognitive neurophysiology of the prefrontal cortex. Handbook of Clinical Neurology.

J. Winer, B. Mander, Randolph Helfrich, A. Maass, T. Harrison, S. Baker, R. Knight, W. Jagust, M. Walker (2019). Sleep as a Potential Biomarker of Tau and Beta-Amyloid Burden in the Human Brain. The Journal of Neuroscience.

Randolph Helfrich, A. Breska, R. Knight (2019). Neural entrainment and network resonance in support of top-down guided attention. Current Opinion in Psychology.

Randolph Helfrich, Janna Lendner, B. Mander, H. Guillen, M. Paff, L. Mnatsakanyan, S. Vadera, M. Walker, J. Lin, R. Knight (2019). Bidirectional prefrontal-hippocampal dynamics organize information transfer during sleep in humans. Nature Communications.

Randolph Helfrich, I. Fiebelkorn, S. Szczepanski, J. Lin, J. Parvizi, R. Knight, S. Kastner (2018). Neural Mechanisms of Sustained Attention Are Rhythmic. Neuron.

Randolph Helfrich, B. Mander, W. Jagust, R. Knight, M. Walker (2018). Old Brains Come Uncoupled in Sleep: Slow Wave- Spindle Synchrony, Brain Atrophy, and Forgetting. Neuron.

Randolph Helfrich (2017). The rhythmic nature of visual perception. Journal of Neurophysiology.

Randolph Helfrich (2017). Prefrontal cortex modulates posterior alpha oscillations during top-down guided visual perception. PNAS.

B. Ram, Randolph Helfrich (2017). Waves of Perception. Frontiers for Young Minds.

S. Katarina Slama, Randolph Helfrich (2017). How Does Expectation Shape Object-Based Attentional Selection?. The Journal of Neuroscience.

Randolph Helfrich, R. Knight (2016). Oscillatory Dynamics of Prefrontal Cognitive Control. Journal of Neuroscience.

Randolph Helfrich, C. Herrman, A. Engel, T. Schneider (2016). Different coupling modes mediate cortical cross-frequency interactions. Neuroimage.

Randolph Helfrich, H. Knepper, G. Nolte, M. Sengelmann, P. König, T. Schneider, A. Engel (2016). Spectral Fingerprints of Large-Scale Cortical Dynamics During Ambiguous Motion Perception. Human Brain Mapping.

Randolph Helfrich, H. Knepper, G. Nolte, M. Sengelmann, P. König, T. Schneider, A. Engel (2016). Entrainment of Brain Oscillations by Transcranial Alternating Current Stimulation. Current Biology.

E. Johnson, Randolph Helfrich (2016). How Brain Cells Make Memories. Frontiers for Young Minds.

C. Herrmann, D. Strübel, Randolph Helfrich, A. Engel (2016). EEG oscillations: From correlation to causality. International Journal of Psychophysiology.

Randolph Helfrich, H. Knepper, G. Nolte, D. Strüber, S. Rach, C. Herrmann, T. Schneider, A. Engel (2014). Selective Modulation of Interhemispheric Functional Connectivity by HD-tACS Shapes Perception. PLoS Biology.

Randolph Helfrich, T. Schneider (2013). Modulation of Cortical Network Activity by Transcranial Alternating Current Stimulation. Journal of Neuroscience.

Randolph Helfrich, H. Becker, T. Haarmeier (2013). Processing of Coherent Visual Motion in Topographically Organized Visual Areas in Human Cerebral Cortex. Brain Topogr.