Search Results - "Randolph, F."

Oscillatory Dynamics of Prefrontal Cognitive Control by Helfrich, Randolph F, Knight, Robert T

“…The prefrontal cortex (PFC) provides the structural basis for numerous higher cognitive functions. However, it is still largely unknown which mechanisms…”
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Entrainment of Brain Oscillations by Transcranial Alternating Current Stimulation by Helfrich, Randolph F., Schneider, Till R., Rach, Stefan, Trautmann-Lengsfeld, Sina A., Engel, Andreas K., Herrmann, Christoph S.

“…Novel methods for neuronal entrainment [1–4] provide the unique opportunity to modulate perceptually relevant brain oscillations [5, 6] in a frequency-specific…”
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Neural Mechanisms of Sustained Attention Are Rhythmic by Helfrich, Randolph F., Fiebelkorn, Ian C., Szczepanski, Sara M., Lin, Jack J., Parvizi, Josef, Knight, Robert T., Kastner, Sabine

“…Classic models of attention suggest that sustained neural firing constitutes a neural correlate of sustained attention. However, recent evidence indicates that…”
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EEG oscillations: From correlation to causality by Herrmann, Christoph S., Strüber, Daniel, Helfrich, Randolph F., Engel, Andreas K.

“…Already in his first report on the discovery of the human EEG in 1929, Berger showed great interest in further elucidating the functional roles of the alpha…”
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Selective modulation of interhemispheric functional connectivity by HD-tACS shapes perception by Helfrich, Randolph F, Knepper, Hannah, Nolte, Guido, Strüber, Daniel, Rach, Stefan, Herrmann, Christoph S, Schneider, Till R, Engel, Andreas K

“…Oscillatory neuronal synchronization between cortical areas has been suggested to constitute a flexible mechanism to coordinate information flow in the human…”
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Perfluoroalkyl and polyfluoroalkyl substances (PFAS) and their effects on the ovary by Ding, Ning, Harlow, Siobán D, Randolph Jr, John F, Loch-Caruso, Rita, Park, Sung Kyun

“…Abstract BACKGROUND Perfluoroalkyl and polyfluoroalkyl substances (PFAS) are found widespread in drinking water, foods, food packaging materials and other…”
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Prefrontal cortex modulates posterior alpha oscillations during top-down guided visual perception by Helfrich, Randolph F., Huang, Melody, Wilson, Guy, Knight, Robert T.

“…Conscious visual perception is proposed to arise from the selective synchronization of functionally specialized but widely distributed cortical areas. It has…”
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An electrophysiological marker of arousal level in humans by Lendner, Janna D, Helfrich, Randolph F, Mander, Bryce A, Romundstad, Luis, Lin, Jack J, Walker, Matthew P, Larsson, Pal G, Knight, Robert T

“…Deep non-rapid eye movement sleep (NREM) and general anesthesia with propofol are prominent states of reduced arousal linked to the occurrence of synchronized…”
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Old Brains Come Uncoupled in Sleep: Slow Wave-Spindle Synchrony, Brain Atrophy, and Forgetting by Helfrich, Randolph F., Mander, Bryce A., Jagust, William J., Knight, Robert T., Walker, Matthew P.

“…The coupled interaction between slow-wave oscillations and sleep spindles during non-rapid-eye-movement (NREM) sleep has been proposed to support memory…”
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Bidirectional prefrontal-hippocampal dynamics organize information transfer during sleep in humans by Helfrich, Randolph F., Lendner, Janna D., Mander, Bryce A., Guillen, Heriberto, Paff, Michelle, Mnatsakanyan, Lilit, Vadera, Sumeet, Walker, Matthew P., Lin, Jack J., Knight, Robert T.

“…How are memories transferred from short-term to long-term storage? Systems-level memory consolidation is thought to be dependent on the coordinated interplay…”
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The rhythmic nature of visual perception by Helfrich, Randolph F

“…Our continuous perception of the world could be the result of discrete sampling, where individual snapshots are seamlessly fused into a coherent stream. It has…”
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Slow oscillation-spindle coupling predicts enhanced memory formation from childhood to adolescence by Hahn, Michael A, Heib, Dominik, Schabus, Manuel, Hoedlmoser, Kerstin, Helfrich, Randolph F

“…Precise temporal coordination of slow oscillations (SO) and sleep spindles is a fundamental mechanism of sleep-dependent memory consolidation. SO and spindle…”
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Defining slow wave sleep without slow waves by Lendner, Janna D., Helfrich, Randolph F.

“…Recent research by Parks, Schneider, and colleagues demonstrates that brain states during rodent sleep can be predicted from neural activity on millisecond and…”
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Aperiodic sleep networks promote memory consolidation by Helfrich, Randolph F., Lendner, Janna D., Knight, Robert T.

“…Hierarchical synchronization of sleep oscillations establishes communication pathways to support memory reactivation, transfer, and consolidation. From an…”
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Sleep as a Potential Biomarker of Tau and β-Amyloid Burden in the Human Brain by Winer, Joseph R, Mander, Bryce A, Helfrich, Randolph F, Maass, Anne, Harrison, Theresa M, Baker, Suzanne L, Knight, Robert T, Jagust, William J, Walker, Matthew P

“…Recent proposals suggest that sleep may be a factor associated with accumulation of two core pathological features of Alzheimer's disease (AD): tau and…”
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Cognitive neurophysiology: Event-related potentials by Helfrich, Randolph F, Knight, Robert T

“…Event-related potentials (ERPs) are one of the most commonly used tools to assess cognitive processing with a high temporal resolution. We provide an updated…”
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Neural entrainment and network resonance in support of top-down guided attention by Helfrich, Randolph F, Breska, Assaf, Knight, Robert T

“…•Behavioral and neural periodicities reflect phase-aligned oscillations.•Entrainment and resonance as distinct possible mechanisms.•Physical network properties…”
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Change in Follicle-Stimulating Hormone and Estradiol Across the Menopausal Transition: Effect of Age at the Final Menstrual Period by Randolph, John F, Zheng, Huiyong, Sowers, MaryFran R, Crandall, Carolyn, Crawford, Sybil, Gold, Ellen B, Vuga, Marike

“…The time span and patterns of change in serum FSH and E2 across the menopausal transition do not vary by age at the final menstrual period. Background and…”
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Per- and Polyfluoroalkyl Substances and Hormone Levels During the Menopausal Transition by Harlow, Siobán D, Hood, Michelle M, Ding, Ning, Mukherjee, Bhramar, Calafat, Antonia M, Randolph, John F, Gold, Ellen B, Park, Sung Kyun

“…Per- and polyfluoroalkyl substances (PFAS) are widespread chemicals that may affect sex hormones and accelerate reproductive aging in midlife women. To examine…”
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Multiple Intrinsic Timescales Govern Distinct Brain States in Human Sleep by Lendner, Janna D, Lin, Jack J, Larsson, Pål G, Helfrich, Randolph F

“…Human sleep exhibits multiple, recurrent temporal regularities, ranging from circadian rhythms to sleep stage cycles and neuronal oscillations during nonrapid…”
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