A5028988828- Memory and Neural Mechanisms
- Memory Processes and Influences
- Neural dynamics and brain function
- Neural and Behavioral Psychology Studies
- Topic Modeling
- Neural Networks and Applications
- Child and Animal Learning Development
- Neuroscience and Neuropharmacology Research
- Functional Brain Connectivity Studies
- Domain Adaptation and Few-Shot Learning
- Face Recognition and Perception
- Information Retrieval and Search Behavior
- EEG and Brain-Computer Interfaces
- Cognitive Functions and Memory
- Neurobiology of Language and Bilingualism
- Personal Information Management and User Behavior
- Advanced Memory and Neural Computing
- Intelligent Tutoring Systems and Adaptive Learning
- Visual perception and processing mechanisms
- Schizophrenia research and treatment
- Bayesian Modeling and Causal Inference
- Neural Networks and Reservoir Computing
- Visual and Cognitive Learning Processes
- Scientific Research and Philosophical Inquiry
- Sleep and Wakefulness Research
Vanderbilt University
2012-2024
California University of Pennsylvania
2019-2024
Syracuse University
2024
Florida State University
2023
University of Pennsylvania
2001-2013
Princeton University
2005-2006
University of Virginia Health System
2001
University of Virginia
2000
Neurological Surgery
2000
The authors present the context maintenance and retrieval (CMR) model of memory search, a generalized version temporal M. W. Howard J. Kahana (2002a), which proposes that search is driven by an internally maintained representation composed stimulus-related source-related features. In CMR model, organizational effects (the tendency for related items to cluster during recall sequence) arise as consequence associations between active elements features studied material. Semantic clustering due...
Here we describe a functional magnetic resonance imaging study of humans engaged in memory search during free recall task. Patterns cortical activity associated with the three categories pictures (faces, locations, and objects) were identified by pattern-classification algorithm. The algorithm was used to track reappearance these patterns period. given category's pattern correlates verbal recalls made from that category precedes event several seconds. This result is consistent hypothesis...
In many species, spatial navigation is supported by a network of place cells that exhibit increased firing whenever an animal in certain region environment. Does this neural representation location form part the spatiotemporal context into which episodic memories are encoded? We recorded medial temporal lobe neuronal activity as epilepsy patients performed hybrid and memory task. identified place-responsive active during virtual then asked whether same activated subsequent recall...
Psychological theories of memory posit that when people recall a past event, they not only recover the features event itself, but also information associated with other events occurred nearby in time. The surrounding target and thoughts evoke, may be considered to represent context for helping distinguish from similar experienced at different times. ability reinstate this contextual during search has been hallmark episodic, or event-based, memory. We sought determine whether reinstatement...
The human memory system is remarkable in its capacity to focus search on items learned a given context. This can be so precise that many leading models of assume only those the context recently studied list compete for recall. We sought extend explanatory scope these include not intralist phenomena, such as primacy and recency effects, but also interlist phenomena proactive retroactive interference. Building retrieved temporal (e.g., Polyn, Norman, & Kahana, 2009), we present substantially...
We present a new learning algorithm that leverages oscillations in the strength of neural inhibition to train networks. Raising can be used identify weak parts target memories, which are then strengthened. Conversely, lowering competitors, weakened. To update weights, we apply Contrastive Hebbian Learning equation successive time steps network. The sign weight change varies as function phase inhibitory oscillation. show memorize large numbers correlated input patterns without collapsing and...
Neural circuitry in the medial temporal lobe (MTL) is critically involved mental time travel, which involves vivid retrieval of details past experience. Neuroscientific theories propose that MTL supports memory by retrieving previously encoded episodic information, as well reactivating a code specifying position particular event within an episode. However, neural computations supporting these abilities are underspecified. To test hypotheses regarding computational mechanisms supported...
In recalling a list of previously experienced items, participants are known to organize their responses on the basis items' semantic and temporal similarities. Here, we examine how spatial information influences organization in free recall. Experiment 1, studied subsequently recalled lists landmarks. 2, played game which they delivered objects landmarks virtual environment later objects. Participants both experiments were simply asked recall as many items could remember any order. By...
Neuroimaging studies have identified two major large-scale brain networks, the default mode network (DMN) and dorsal attention (DAN), which are engaged for internally externally directed cognitive tasks respectively, show anticorrelated activity during cognitively demanding tests at rest. We these networks using independent component analysis (ICA) of functional magnetic resonance imaging data, examined their interactions free-recall task, a self-initiated memory search task in retrieval is...
Retrieved-context models of human memory propose that as material is studied, retrieval cues are constructed allow one to target particular aspects past experience. We examined the neural predictions these by using electrocorticographic/depth recordings and scalp electroencephalography (EEG) characterize category-specific oscillatory activity, while participants studied recalled items from distinct, neurally discriminable categories. During study, patterns predict whether a item will be...
In recalling a set of previously experienced events, people exhibit striking effects recency, contiguity, and similarity: Recent items tend to be recalled best first, that were studied in neighboring positions or are similar one another some other way evoke during recall. Effects recency contiguity have most often been investigated tasks require recall random word lists. Similarity categorized Here we examine lists composed drawn from 3 distinct taxonomic categories which given category...
Experiences occur in a continual succession, and the temporal structure of those experiences is often preserved memory. The contiguity effect free recall reveals memory: when particular item remembered, next response likely to come from nearby list position. This remarkably robust, appearing across wide variety methodological variations task. also central retrieved-context models, which propose organization arises interaction context representation with contents Across six experiments, we...
Neuroimaging studies of recognition memory have identified distinct patterns cortical activity associated with two sets cognitive processes: Recollective processes supporting retrieval information specifying a probe item's original source are the posterior hippocampus, ventral parietal cortex, and medial pFC. Familiarity correct identification previously studied probes (in absence recollective response) in anterior temporal lobe (MTL) structures including perirhinal cortex addition to...