منابع مشابه
How the brain keeps the eyes still.
The brain can hold the eyes still because it stores a memory of eye position. The brain's memory of horizontal eye position appears to be represented by persistent neural activity in a network known as the neural integrator, which is localized in the brainstem and cerebellum. Existing experimental data are reinterpreted as evidence for an "attractor hypothesis" that the persistent patterns of a...
متن کاملA quadruple photoreceptor mutant still keeps track of time
Time measurement and light detection are inextricably linked. Cryptochromes, the blue-light photoreceptors shared between plants and animals, are critical for circadian rhythms in flies and mice [1-3]. WC-1, a putative blue-light photoreceptor, is also essential for the maintenance of circadian rhythms in Neurospora [4]. In contrast, we report here that in Arabidopsis thaliana the double mutant...
متن کاملFrom Status to Agency: Abolishing
In response to challenges that the disparate impact doctrine violates the Fourteenth Amendment’s Equal Protection Clause, the Thirteenth Amendment provides a constitutional foundation that deflects the equal protection argument. Early interpreters of the Thirteenth Amendment envisioned the provision as a means to abolish chattel as well as civil slavery, which was the condition of subordinate s...
متن کاملEndogenous Status Concerns in Agency
I consider a simple linear principal-agent model with one principal and two agents and explore the rationality and efficiency of endogenous status concerns on the part of the agents. Following CasadesusMasanell (2004), I assume that status concerns have no real utility value and posit that status concerns are chosen to maximise only material utility. First, I find that status concerns cannot im...
متن کاملNsf.
Genome-wide association studies (GWAS) facilitate largescale identification of genomic variants that are associated with complex traits. However, susceptibility loci identified by GWAS so far generally account for a limited fraction of the genotypic variation in patient populations. Predictive models based on identified loci also have modest success in risk assessment and therefore are of limit...
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ژورنال
عنوان ژورنال: Nature
سال: 1994
ISSN: 0028-0836,1476-4687
DOI: 10.1038/367497c0