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262 results for “theta”
High-Frequency vs. Theta-Burst TMS for Depression
ClinicalTrials.gov study NCT07181226. IPD Sharing: NO. Countries: 1. Publications: 0.
Influence of Theta Burst Stimulation and Carbidopa-Levodopa on Motor Performance in Stroke Patients
ClinicalTrials.gov study NCT00366184. IPD Sharing: Not stated. Countries: 1. Publications: 3.
Theta Phase-specific TMS to Modulate Prefrontal Activity
ClinicalTrials.gov study NCT05416138. IPD Sharing: YES. Countries: 1. Publications: 0.
Data from: Theta-modulation drives the emergence of connectivity patterns underlying replay in a network model of place cells
Open the record for dataset details and reuse information.
Effect of theta toxin secreted by live S. typhimurium inside spheroids of lung cancer cell lines H460 and H1819
GEO Series GSE210560. Homo sapiens. 12 samples. Type: Expression profiling by high throughput sequencing.
Effect of the rhesus theta defensin-1 (RTD-1) on gene expression in human monocytes. [II]
GEO Series GSE278568. Homo sapiens. 6 samples. Type: Expression profiling by high throughput sequencing.
Polymerase theta-mediated end-joining repairs persistent G1-induced DNA breaks in S/G2.
GEO Series GSE306291. Mus musculus. 25 samples. Type: Other.
Regulation of inducible genes in epithelial to mesenchymal transition by chromatinized PKC-theta
GEO Series GSE53335. Homo sapiens. 12 samples. Type: Genome binding/occupancy profiling by high throughput sequencing; Expression profiling by array.
Enhancement of Hippocampal Spatial Decoding with a Q-Learning Method Utilizing Theta Rhythm Phase Precession as the Relative Reward Approach
<p> Winners of the 2014 Nobel Prize in Physiology or Medicine, Professors John O’Keefe, May‐Britt Moser and Edvard I. Moser found that the internal global positioning system (GPS) in the brain allows us to be able to flexibly navigate the world they live in – exploring new areas, returning quickly to remembered places, and taking shortcuts and confirmed that place cells in hippocampus and grid cells in entorhinal cortex (EC) are responsible for higher-order cognitive map of the environment. Indeed, these abilities feel so easy and natural that it is not immediately obvious how complex the underlying processes really are. In contrast, spatial navigation remains a substantial challenge for artificial agents whose abilities are far outstripped by those of mammals. </p> <p> Hippocampal place cells and interneurons in mammals have proved that they own stable place fields and theta phase precession profiles to encode the spatial information from the environment. The hippocampal CA1 neurons can be represented as the location of the animal and the prospective information of goal location. Reinforcement learning algorithm, e.g., Q-learning, has been adopted to build a navigation model of place cells for the purpose of addressing goal direction navigation problems.<br> In this study, we propose dynamical Q-learning (dQ-learning), because of its adaptive reward function based on theta phase precession, which has recently been associated with a rat’s experiences at destinations, and use of information from both place cells and interneurons as inputs to predict the animal’s trajectory. We evaluated the convergence rates and learning performances of tQ-learning and dQ-learning with different cell types. The results demonstrate that dQ-learning improves learning performance and convergence rate and place cells and interneurons with phase precession may provide valuable information to improve the prediction of trajectory. To investigate whether the enhancement of hippocampal spatial decoding with the dQ-learning method was effective in goal-direction navigation, experimental data were recorded from rats implanted with microelectrodes and trained in a water reward task. During the task electrophysiological recordings of spikes, LFPs, and movement trajectories were acquired. The proposed dQ-learning algorithm achieved better learning performance with good prediction accuracy and a high convergence rate. The adaptive reward function and cell types were found to be critical factors for hippocampal spatial decoding using the dQ-learning method. </p>
Data from: EEG theta dynamics within frontal and parietal cortices for error processing during reaching movements in a prism adaptation study altering visuo-motor predictive planning
Modulation of frontal midline theta (fmθ) is observed during error commission, but little is known about the role of theta oscillations in correcting motor behaviours. We investigate EEG activity of healthy partipants executing a reaching task under variable degrees of prism-induced visuo-motor distortion and visual occlusion of the initial arm trajectory. This task introduces directional errors of different magnitudes. The discrepancy between predicted and actual movement directions (i.e. the error), at the time when visual feedback (hand appearance) became available, elicits a signal that triggers on-line movement correction. Analysis were performed on 25 EEG channels. For each participant, the median value of the angular error of all reaching trials was used to partition the EEG epochs into high- and low-error conditions. We computed event-related spectral perturbations (ERSP) time-locked either to visual feedback or to the onset of movement correction. ERSP time-locked to the onset of visual feedback showed that fmθ increased in the high- but not in the low-error condition with an approximate time lag of 200 ms. Moreover, when single epochs were sorted by the degree of motor error, fmθ started to increase when a certain level of error was exceeded and, then, scaled with error magnitude. When ERSP were time-locked to the onset of movement correction, the fmθ increase anticipated this event with an approximate time lead of 50 ms. During successive trials, an error reduction was observed which was associated with indices of adaptations (i.e., aftereffects) suggesting the need to explore if theta oscillations may facilitate learning. To our knowledge this is the first study where the EEG signal recorded during reaching movements was time-locked to the onset of the error visual feedback. This allowed us to conclude that theta oscillations putatively generated by anterior cingulate cortex activation are implicated in error processing in semi-naturalistic motor behaviours.
Intermittent Theta Burst Stimulation and Repetitive Transcranial Magnetic Stimulation Combined With Robotic Rehabilitation on Ambulation in Spinal Cord Injury Patients
ClinicalTrials.gov study NCT06248476. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Treating Social Cognition With Theta Burst Stimulation; a Pilot Sudy
ClinicalTrials.gov study NCT02440867. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Investigating the Physiology of Targeted Theta-burst Neuromodulation
ClinicalTrials.gov study NCT02616835. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Theta Burst Stimulation for Gambling Disorder
ClinicalTrials.gov study NCT05872750. IPD Sharing: NO. Countries: 1. Publications: 0.
Comparison of the Efficacy of Accelerated Intermittent Theta Burst Stimulation and Accelerated Continuous Theta Burst Stimulation in Patients With Treatment-Resistant Depression
ClinicalTrials.gov study NCT07264452. IPD Sharing: NO. Countries: 1. Publications: 0.
Accelerated Intermittent Theta Burst Stimulation (AiTBS)on Neuropathic Pain
ClinicalTrials.gov study NCT07148388. IPD Sharing: NO. Countries: 1. Publications: 0.
Effect of Intermittent Theta Burst Stimulation (iTBS) for Alleviating Symptoms of Schizophrenia Patients
ClinicalTrials.gov study NCT03868358. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Right-sided 1-Hz Repetitive Transcranial Magnetic Stimulation (rTMS) Versus Left-sided Intermittent Theta Burst Stimulation (iTBS) in Patients With Depression
ClinicalTrials.gov study NCT07026461. IPD Sharing: NO. Countries: 1. Publications: 0.
Accelerated Bilateral Sequential Theta Burst Stimulation in Older Adults With Treatment-resistant Depression
ClinicalTrials.gov study NCT06323486. IPD Sharing: YES. Countries: 1. Publications: 0.
Repetitive Transcranial Magnetic Stimulation and Intermittent Theta Burst (iTBS) in Schizophrenia
ClinicalTrials.gov study NCT01315587. IPD Sharing: Not stated. Countries: 1. Publications: 0.
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.