A5070916160- Spatial Cognition and Navigation
- Memory and Neural Mechanisms
- Child and Animal Learning Development
- Neural and Behavioral Psychology Studies
- Visual perception and processing mechanisms
- Neural dynamics and brain function
- Geography Education and Pedagogy
- Virtual Reality Applications and Impacts
- EEG and Brain-Computer Interfaces
- Functional Brain Connectivity Studies
- Memory Processes and Influences
- Robotics and Automated Systems
- Mental Health Research Topics
- Neuroscience and Neuropharmacology Research
- Cognitive Science and Mapping
- Insect and Pesticide Research
- Augmented Reality Applications
- Face Recognition and Perception
- Robotics and Sensor-Based Localization
- Gaze Tracking and Assistive Technology
- Advanced Optical Imaging Technologies
University of Arizona
2018-2022
University of California, Irvine
2022
University of California, Davis
2017-2021
Center for Neurosciences
2018-2020
University of Wisconsin–Madison
2014-2016
The ability to hold information in working memory is fundamental for cognition. Contrary the long-standing view that depends on sustained, elevated activity, we present evidence suggesting humans can via "activity-silent" synaptic mechanisms. Using multivariate pattern analyses decode brain activity patterns, found active representation of an item drops baseline when attention shifts away. A targeted pulse transcranial magnetic stimulation produced a brief reemergence concurrently measured...
Although the manipulation of load is popular in visual working memory research, many studies confound general attentional demands with context binding by drawing memoranda from same stimulus category. In this fMRI study human observers (both sexes), we created high- versus low-binding conditions, while holding constant, comparing trials requiring for direction motion one random dot kinematogram (RDK; 1M trials) three RDKs (3M), or RDK and two color patches (1M2C). Memory precision was...
Past studies suggest that learning a spatial environment by navigating on desktop computer can lead to significant acquisition of knowledge, although typically less than in the real world. Exactly how this might differ when immersive virtual interfaces offer rich set multisensory cues remains be fully explored. In study, participants learned campus building (1) real-world version, (2) an version involving omnidirectional treadmill and head-mounted display, or (3) navigated with mouse...
Abstract Research into the behavioral and neural correlates of spatial cognition navigation has benefited greatly from recent advances in virtual reality (VR) technology. Devices such as head-mounted displays (HMDs) omnidirectional treadmills provide research participants with access to a more complete range body-based cues, which facilitate naturalistic study learning memory three-dimensional (3D) spaces. One limitation using these technologies for applications is that they almost...
Abstract Numerous reports have demonstrated low‐frequency oscillations during navigation using invasive recordings in the hippocampus of both rats and human patients. Given evidence, some cases, synchronization between midline cortex hippocampus, it is also possible that movement‐related manifest healthy neocortex. However, this possibility remains largely unexplored, part due to difficulties coupling free ambulation effective scalp EEG recordings. In current study, participants freely...
An important question regards how we use environmental boundaries to anchor spatial representations during navigation. Behavioral and neurophysiological models appear provide conflicting predictions, this has been difficult answer because of technical challenges with testing navigation in novel, large-scale, realistic environments. We conducted an experiment which participants freely ambulated on omnidirectional treadmill while viewing town-sized environments virtual reality a head-mounted...
Studying human spatial navigation in the lab can be challenging, particularly when including non-invasive neural measures like functional magnetic resonance imaging (fMRI) and scalp encephalography (EEG). While there is broad consensus that involves both egocentric (self-referenced) allocentric (world-referenced) coding schemes, exactly how these measured ecologically meaningful situations remains controversial. Here, we explore two forms of representation might better measure them by...
What mechanisms underlie the prioritization of neural representations visually perceived information to guide behavior? We assessed dynamics whereby attention biases competition for representation visual stimuli by enhancing relevant and suppressing irrelevant. Multivariate pattern analysis (MVPA) classifiers were trained discriminate patterns fMRI activity associated with each three stimuli, within several predefined ROIs. Participants performed a change-detection task wherein two presented...
Abstract Past reports have suggested that active visual training in virtual reality (VR) can reduce symptoms of cybersickness. Here, we adapted such a protocol to computer-based version and compared it with passive exposure control condition. We employed heart rate other subjective predictors cybersickness try predict the efficacy intervention as well likelihood drop out. While found significant decrease across sessions, did not appear be effective at reducing or dropout. However, increase...
Past reports have suggested that active visual training in virtual reality (VR) can reduce symptoms of cybersickness. Here, we adapted such a protocol to computer-based version and compared it with passive exposure control condition. We employed heart rate other subjective predictors cybersickness try predict the efficacy intervention as well likelihood drop out. While found significant decrease across sessions, did not appear be effective at reducing or dropout. However, increase 15.5 bpm...