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This study used functional magnetic resonance imaging (fMRI) to investigate the neural mechanisms underlying two types of spatial transformations: imagined object rotations and imagined rotations of the self about an object. Participants viewed depictions of single three-dimensional Shepard--Metzler objects situated within a sphere. A T-shaped prompt(More)
We examined the frame of reference of auditory responses in the inferior colliculus in monkeys fixating visual stimuli at different locations. Eye position modulated the level of auditory responses in 33% of the neurons we encountered, but it did not appear to shift their spatial tuning. The effect of eye position on auditory responses was(More)
A number of problems in image reconstruction and image processing can be addressed, in principle, using the sinc kernel. Since the sinc kernel decays slowly, however, it is generally avoided in favor of some more local but less precise choice. In this paper, we describe the fast sinc transform, an algorithm which computes the convolution of arbitrarily(More)
Introduction In MRI, one seeks to produce an accurate image of the effective spin density, ρ(r), from a set of measurements {s q } acquired in the Fourier domain. Because the signal equation (1a) is a continuous-to-discrete mapping, image reconstruction is inherently ill-posed, i.e., infinitely many functions give rise to the same data. Complicating(More)
capture and the ventriloquism effect) would be well Department of Psychological and Brain Sciences served by an eye-centered reference frame, as would Center for Cognitive Neuroscience guidance of any behavior that can be governed by both 6207 Moore Hall visual and auditory stimuli (e. 2000). If an eye-centered reference frame for sound has Hanover, New(More)
The neurotransmitter dopamine is central to the emerging discipline of neu-roeconomics; it is hypothesized to encode the difference between expected and realized rewards and thereby to mediate belief formation and choice. We develop the first formal tests of this theory of dopaminergic function, based on a recent axiomatization by Caplin and Dean (Quarterly(More)
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