A5086040152- Memory and Neural Mechanisms
- Neural and Behavioral Psychology Studies
- Neural dynamics and brain function
- Memory Processes and Influences
- EEG and Brain-Computer Interfaces
- Functional Brain Connectivity Studies
- Sleep and Wakefulness Research
- Neuroscience and Neuropharmacology Research
- Mindfulness and Compassion Interventions
- Neuroscience, Education and Cognitive Function
- Music Therapy and Health
- Receptor Mechanisms and Signaling
- Deception detection and forensic psychology
- Neurobiology of Language and Bilingualism
- Creativity in Education and Neuroscience
- Neurological disorders and treatments
- Library Science and Information Literacy
- Olfactory and Sensory Function Studies
- Decision-Making and Behavioral Economics
- Advanced Memory and Neural Computing
- Cognitive Functions and Memory
- Child and Animal Learning Development
- Knowledge Management and Sharing
- Undergraduate Neuroscience Education and Research
- Educational Strategies and Epistemologies
Bowdoin College
2015-2024
John Brown University
2017
Brown University
2011-2015
University of Colorado Boulder
2007-2011
Columbia University
2010
What are the neural dynamics of choice processes during reinforcement learning? Two largely separate literatures have examined learning (RL) as a function experience but assuming static process, or conversely, in decision making based on values. Here we show that human RL well described by drift diffusion model (DDM) which learned trial-by-trial reward values sequentially sampled, with made when value signal crosses threshold. Moreover, simultaneous fMRI and EEG recordings revealed this...
Whether grocery shopping or choosing words to express a thought, selecting between options can be challenging, especially for people with anxiety. We investigate the neural mechanisms supporting selection during language processing and its breakdown in Our network simulations demonstrate critical role competitive, inhibitory dynamics supported by GABAergic interneurons. As predicted our model, we find that anxiety (associated reduced inhibition) impairs among associated prefrontal cortical...
Active navigation seems to yield better spatial knowledge than passive navigation, but it is unclear how active decision-making influences learning and memory. Here, we examined the contributions of theta oscillations memory-related exploration while testing theories about they contribute learning. Using electroencephalography (EEG), tested individuals on a maze-learning task in which made discrete decisions where explore at each choice point maze. Half participants were free make point,...
This study aimed to clarify the neural substrates of behavioral switch and restart costs in intermittently instructed task-switching paradigms. Event-related potentials (ERPs) were recorded while participants cued or repeat their categorization rule (Switch task), else they performed two perceptually identical control conditions (NoGo Oddball). The three tasks involved different task-sets with distinct stimulus-response associations each, but visual stimulation, consisting frequent colored...
Abstract Although investigations of memory and the dynamics ERP components neural oscillations as assessed through EEG have been well utilized, little research into volitional nature suppression over retrieval used these methods. Oscillation analyses conducted on Think/No-Think (TNT) task are interest to broaden our knowledge associated not only during successful but also when is unwanted or suppressed. In current study, we measured a TNT performed spectral power band analyses. results...
Mindfulness meditation has been shown to improve episodic memory and increase theta oscillations which are known play a role in retrieval. The present study examined the effect of mindfulness on retrieval oscillations. Using longitudinal design, subjects experimental group who underwent four weeks training practice were compared waitlist control group. During pre-training post-training sessions completed Five Facet Questionnaire (FFMQ) studied adjectives either imagined scene (Place Task) or...
Although there has been recent interest in how mindfulness meditation can affect episodic memory as well brain structure and function, no study examined the behavioral neural effects of on memory. Here we present a protocol that combines training, an task, EEG to examine changes performance correlates Subjects experimental group were compared waitlist control group. spent four weeks training practicing meditation. Mindfulness was measured before after using Five Facet Questionnaire (FFMQ)....
A critical problem for developing personalized treatment plans cognitive disruptions is the lack of understanding how individual differences influence cognition. Recognition memory one ability that varies from person to and variation may be related different genetic phenotypes. One gene impact recognition monoamine oxidase (MAO-A), which influences transcription rate MAO-A. Examination MAO-A phenotypes behavioral event-related potentials (ERPs) correlates help explain in performance....
Abstract Theta and gamma oscillations have been linked to episodic memory processes in various studies. Both seem be vital for guided by the medial temporal lobe, such as retrieval of information from memory. While theta increase with successful memory, it is unclear what unique contribution subcomponents On other hand, memory‐related mainly reported hippocampus, leaving role neocortical underexplored. In this study, we investigated how variability accuracy confidence contributes...
Dual process models suggest that recognition memory is supported by familiarity and recollection processes. Previous research administering amnesic drugs measuring ERPs during have provided evidence for separable neural correlates of recollection. This study examined the effect midazolam-induced amnesia on details proposed ERP recognition. Midazolam or saline was administered while subjects studied oriented pictures common objects. were recorded a test 1 day later. Subjects' discrimination...
Evidence from fMRI has consistently located a widespread network of frontal, parietal, and temporal lobe regions during episodic retrieval. However, the limitations methodology have made it difficult to assess transient dynamics by which these distributed coordinate activity. Recent evidence suggests that beta oscillations (17-20 Hz) are important for top-down control memory suppression. spatial EEG make relationship between oscillatory signals networks identified with fMRI. This study used...
Abstract Introduction Although previous research suggests that genetic variation in dopaminergic genes may affect recognition memory, the role dopamine transporter expression have on behavioral and EEG correlates of memory has not been well established. Objectives The study aims to reveal how individual differences functioning due variations gene influences memory. Methods Fifty‐eight participants performed an item task. Participants were asked retrieve 200 previously presented words while...
Abstract To successfully encode information into long‐term memory, we need top‐down control to focus our attention on target stimuli. This attentional is achieved by the modulation of sensory neuronal excitability through alpha power. Failure modulate power and inhibit distracting has been reported in older adults during working memory tasks. Given that encoding can predict subsequent performance, aberrant oscillatory modulations might play a role age‐related deficits. However, it unknown...
The information transfer necessary for successful memory retrieval is believed to be mediated by theta and gamma oscillations. These oscillations have been linked processes in electrophysiological studies, which were correlational nature. In the current study, we used transcranial alternating stimulation (tACS) externally modulate brain examine its direct effects on performance. Participants received sham, (4 Hz), (50 Hz) tACS over frontoparietal regions while retrieving a source paradigm....
Abstract The information transfer necessary for successful memory retrieval is believed to be mediated by theta and gamma oscillations. These oscillations have been linked processes in electrophysiological studies, which were correlational nature. In the current study, we used transcranial alternating stimulation (tACS) externally modulate brain examine its direct effects on performance. Participants received sham, (4 Hz), (50 Hz) tACS over frontoparietal regions while retrieving a source...