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15 results for “spatial orientation”
Pupil dilation during orienting of attention and conscious detection of visual targets in patients with left spatial neglect
<p>Right Brain-Damaged patients (RBD) with left spatial neglect (N+), are characterised by deficits in orienting and re-orienting attention to stimuli in the contralesional left side of space. In a recent ERPs study with visual stimuli (Lasaponara et al., 2018) we have pointed out that the pathological attentional bias of N+ is matched with exaggerated novelty reaction and contextual updating of targets in the right ipsilesional space and reduced novelty reaction and contextual updating of targets in the left contralesional space. To characterise further the attentional performance of N+, here we measured Pupil Dilation (PDil), which is a reliable marker of noradrenergic-locus coeruleus activity and response to unexpected events/rewards. Compared to Neutral and Valid targets, N+ patients displayed a pathological reduction of PDil in response to infrequent Invalid targets in the left side of space, while in Healthy Controls (HC) and RBD without neglect (N-) the same targets enhanced PDil with respect to Neutral and frequent Valid targets. Invalid targets in the right side of space enhanced PDil in all experimental groups. Interestingly, both N- and N+ showed a consistent number of target omissions both in the left and right side of space. With respect to seen targets, N- showed reduced PDil in response to unseen targets both in the left and right side of space. In contrast, N+ had reduced PDil in response to unseen targets in the left side of space though not in the right side, where seen and unseen targets evoked comparable levels of PDil. These results disclose, for the first time, the PDil correlates of spatial attention in left spatial neglect and suggest that the pathological attentional bias suffered by N+ might enhance the autonomic responses reflected in PDil to unseen ipsilesional stimuli. This enhancement can contribute to biasing contextual updating and predictive coding of stimuli in the ipsilesional space, thus worsening the pathological attentional bias of N+.</p>
Supplementary material 4 from: Hong SC, Magarey RD, Borchert DM, Vargas RI, Souder SK (2015) Site-specific temporal and spatial validation of a generic plant pest forecast system with observations of Bactrocera dorsalis (oriental fruit fly). NeoBiota 27: 37-67. https://doi.org/10.3897/neobiota.27.5177
Figure S1: Explanation note: Fit of low temperature mortality function (line) to observations (diamonds).
Supplementary material 5 from: Hong SC, Magarey RD, Borchert DM, Vargas RI, Souder SK (2015) Site-specific temporal and spatial validation of a generic plant pest forecast system with observations of Bactrocera dorsalis (oriental fruit fly). NeoBiota 27: 37-67. https://doi.org/10.3897/neobiota.27.5177
Figure S2: Explanation note: Fit of high temperature mortality function (line) to observations (diamonds).
Supplementary material 1 from: Hong SC, Magarey RD, Borchert DM, Vargas RI, Souder SK (2015) Site-specific temporal and spatial validation of a generic plant pest forecast system with observations of Bactrocera dorsalis (oriental fruit fly). NeoBiota 27: 37-67. https://doi.org/10.3897/neobiota.27.5177
Table S1: Explanation note: List of references for oriental fruit fly (Bactrocera dorsalis) distribution.
Supplementary material 3 from: Hong SC, Magarey RD, Borchert DM, Vargas RI, Souder SK (2015) Site-specific temporal and spatial validation of a generic plant pest forecast system with observations of Bactrocera dorsalis (oriental fruit fly). NeoBiota 27: 37-67. https://doi.org/10.3897/neobiota.27.5177
Table S3: Explanation note: Summary statistics of low and high temperature mortality of Bactrocera dorsalis.
Supplementary material 2 from: Hong SC, Magarey RD, Borchert DM, Vargas RI, Souder SK (2015) Site-specific temporal and spatial validation of a generic plant pest forecast system with observations of Bactrocera dorsalis (oriental fruit fly). NeoBiota 27: 37-67. https://doi.org/10.3897/neobiota.27.5177
Table S2: Explanation note: List of references for Bactrocera invadens distribution (Courtesy to Marc De Meyer, Royal Museum for Central Africa, Tervuren, Belgium).
The Use of Immersive 360-degree Video in Improving Spatial Orientation
ClinicalTrials.gov study NCT05894005. IPD Sharing: NO. Countries: 1. Publications: 12.
Spatial Orientation and Fiberoptic Intubation Skills in the Novice: A Randomized Controlled Trial
ClinicalTrials.gov study NCT02263300. IPD Sharing: NO. Countries: 1. Publications: 6.
Data from: Shear-induced orientational dynamics and spatial heterogeneity in suspensions of motile phytoplankton
Fluid flow, ubiquitous in natural and man-made environments, has the potential to profoundly impact the transport of microorganisms, including phytoplankton in aquatic habitats and bioreactors. Yet, the effect of ambient flow on the swimming behavior of phytoplankton has remained poorly understood, largely due to the difficulty of observing cell-flow interactions at the microscale. Here, we present microfluidic experiments where we tracked individual cells for four species of motile phytoplankton exposed to a spatially non-uniform fluid shear rate, characteristic of many flows in natural and artificial environments. We observed that medium to high mean shear rates (1 – 25 s^-1) produce heterogeneous cell concentrations in the form of regions of accumulation and regions of depletion. The location of these regions relative to the flow depends on the cells' propulsion mechanism, body shape, and flagellar arrangement, as captured by an effective aspect ratio. Species having a large effective aspect ratio accumulated in the high-shear regions, due to shear-induced alignment of the swimming orientation with the fluid streamlines. Species having an effective aspect ratio close to unity exhibited little preferential accumulation at low to moderate flow rates, but strongly accumulated in the low-shear regions under high flow conditions, potentially due to an active, behavioral response of cells to shear. These observations demonstrate that ambient fluid flow can strongly affect the motility and spatial distribution of phytoplankton and highlight the rich dynamics emerging from the interaction between motility, morphology, and flow.
Data from: Shear-induced orientational dynamics and spatial heterogeneity in suspensions of motile phytoplankton
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Unilateral Peripheral Vestibular Dysfunction: Reeducation and Spatial Orientation.
ClinicalTrials.gov study NCT03171181. IPD Sharing: YES. Countries: 1. Publications: 0.
Spatial Orientation and Motor Skills: How to Flip Switches "Down" in Weightlessness?
ClinicalTrials.gov study NCT02850380. IPD Sharing: NO. Countries: 1. Publications: 0.
Spatial Orientation and Vestibular Function
ClinicalTrials.gov study NCT02212847. IPD Sharing: NO. Countries: 1. Publications: 0.
Data from: Gonadotropin-releasing hormone receptor (Gnrhr) gene knock out: normal growth and development of sensory, motor and spatial orientation behavior but altered metabolism in neonatal and prepubertal mice
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Second harmonic generation microscopy reveals the spatial orientation of glutamine-potentiated liver regeneration after hepatectomy
GEO Series GSE290260. Mus musculus. 16 samples. Type: Expression profiling by array.
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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.