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12 results for “dorsal stream”
Reward-based option competition in human dorsal stream and transition from stochastic exploration to exploitation in continuous space
<p>Primates exploring and exploiting a continuous sensorimotor space rely on dynamic maps in the dorsal stream. Two complementary perspectives exist on how these maps encode rewards. Reinforcement learning models integrate rewards incrementally over time, efficiently resolving the exploration/exploitation dilemma. Working memory buffer models explain rapid plasticity of parietal maps but lack a plausible exploration/exploitation policy. The reinforcement learning model presented here unifies both accounts, enabling rapid, information-compressing map updates and efficient transition from exploration to exploitation. As predicted by our model, activity in human fronto-parietal dorsal stream regions, but not in <em>MT+</em>, tracks the number of competing options, as preferred options are selectively maintained on the map while spatiotemporally distant alternatives are compressed out. When valuable new options are uncovered, posterior beta<sub>1</sub>/alpha oscillations desynchronize within 0.4-0.7 s, consistent with option encoding by competing beta<sub>1</sub>-stabilized subpopulations. Altogether, outcomes matching locally cached reward representations rapidly update parietal maps, biasing choices toward often-sampled, rewarded options.</p>
Reward-based option competition in human dorsal stream and transition from stochastic exploration to exploitation in continuous space
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FIGURE 12. Neoacarus hibernicus, larva. A. dorsal idiosoma, B. ventral idiosoma, C in Larval morphology of benthic and interstitial water mites (Acari: Hydrachnidia) from a Luxembourgian stream
FIGURE 12. Neoacarus hibernicus, larva. A. dorsal idiosoma, B. ventral idiosoma, C. area of excretory pore plate. Scale bars: A, B 100µm, C 50 µm.
FIGURE 4. Hygrobates fluviatilis, larva. A. dorsal idiosoma, B. ventral idiosoma, C. palpus, D. ventral gnathosomal base, E in Larval morphology of benthic and interstitial water mites (Acari: Hydrachnidia) from a Luxembourgian stream
FIGURE 4. Hygrobates fluviatilis, larva. A. dorsal idiosoma, B. ventral idiosoma, C. palpus, D. ventral gnathosomal base, E. chelicerae ventral. Scale bars: A, B 100µm, C, D, E 50µm.
FIGURE 2. Torrenticola elliptica, larva. A. dorsal idiosoma, B. ventral idiosoma, C. palpus, D. chelicera, E in Larval morphology of benthic and interstitial water mites (Acari: Hydrachnidia) from a Luxembourgian stream
FIGURE 2. Torrenticola elliptica, larva. A. dorsal idiosoma, B. ventral idiosoma, C. palpus, D. chelicera, E. excretory pore plate. Scale bars: A, B 100µm, C, D, E 50µm.
FIGURE 1. Sperchon denticulatus, larva. A. dorsal idiosoma, B. ventral idiosoma, C. IL, D. IIL, E. IIIL. Scale bars 100 in Larval morphology of benthic and interstitial water mites (Acari: Hydrachnidia) from a Luxembourgian stream
FIGURE 1. Sperchon denticulatus, larva. A. dorsal idiosoma, B. ventral idiosoma, C. IL, D. IIL, E. IIIL. Scale bars 100µm.
Distinct Dimensional Encoding of Speech in the Dorsal and Ventral Auditory Streams
<p>Data and code for "Distinct Dimensional Encoding of Speech in the Dorsal and Ventral Auditory Streams"</p>
FIGURE 8. Feltria motasi, larva. A. dorsal idiosoma, B in Larval morphology of benthic and interstitial water mites (Acari: Hydrachnidia) from a Luxembourgian stream
FIGURE 8. Feltria motasi, larva. A. dorsal idiosoma, B. ventral idiosoma. Scale bar: 100µm.
FIGURE 6. Atractides pumilus, larva. A. dorsal idiosoma, B. ventral idiosoma. Scale bar 100 in Larval morphology of benthic and interstitial water mites (Acari: Hydrachnidia) from a Luxembourgian stream
FIGURE 6. Atractides pumilus, larva. A. dorsal idiosoma, B. ventral idiosoma. Scale bar 100µm.
FIGURE 10. Ljania macilenta, larva. A. dorsal idiosoma, B in Larval morphology of benthic and interstitial water mites (Acari: Hydrachnidia) from a Luxembourgian stream
FIGURE 10. Ljania macilenta, larva. A. dorsal idiosoma, B. ventral idiosoma. Scale bar: 100µm.
Interruption of Dorsal Visual Stream Using TMS
ClinicalTrials.gov study NCT00418652. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Evaluation of Dorsal Visual Stream in Patients With Schizophrenia
ClinicalTrials.gov study NCT01378403. IPD Sharing: Not stated. Countries: 1. Publications: 0.
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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.