Homeless, but heading for success

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Scale Changes Provide an Alternative Cue For the Discrimination of Heading, But Not Object Motion

BACKGROUND Understanding the dynamics of our surrounding environments is a task usually attributed to the detection of motion based on changes in luminance across space. Yet a number of other cues, both dynamic and static, have been shown to provide useful information about how we are moving and how objects around us move. One such cue, based on changes in spatial frequency, or scale, over time...

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Evidence for a Causal Contribution of Macaque Vestibular, But Not Intraparietal, Cortex to Heading Perception.

UNLABELLED Multisensory convergence of visual and vestibular signals has been observed within a network of cortical areas involved in representing heading. Vestibular-dominant heading tuning has been found in the macaque parietoinsular vestibular cortex (PIVC) and the adjacent visual posterior sylvian (VPS) area, whereas relatively balanced visual/vestibular tuning was encountered in the ventra...

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Ideal observer for heading judgments

Several aspects of the viewing situation affect the ability to determine heading from optical flow. These include the amount of depth variation and number of texture elements in the scene, the location and amount of the visual field stimulated, and the position of the focus of expansion within the stimulus. Without a quantification of the discrimination information provided by the stimuli prese...

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Anesthesia for the homeless.

Healthcare for the homeless is often crisis-oriented and fragmented. Homelessness may be associated with ongoing healthcare problems such as tuberculosis, human immunodeficiency virus (HIV), acquired immune deficiency syndrome (AIDS), and substance abuse. The purpose of this study was to identify the anesthesia services required by homeless individuals from an urban area. The anesthesia records...

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ژورنال

عنوان ژورنال: Nature

سال: 2000

ISSN: 0028-0836,1476-4687

DOI: 10.1038/35030350