Spatial updating in human parietal cortex

Posted by / 18-Feb-2016 12:28

Spatial updating in human parietal cortex

The method is based on a nonlinear, fully Bayesian, hierarchical model that decomposes the f MRI time series data into baseline, smooth drift, activation signal, and noise.This chapter shows that this model performs well relative to commonly-used general linear models.

We conclude that updating is not restricted to brain regions involved primarily in attention and the generation of eye movements, but rather, is present in occipital lobe visual areas as well.We report that such orthogonal mislo-calization indeed occurs.Surprisingly, however, the orthogonal mislocalization is restricted to only part of the visual field.We scanned subjects during a task that involved remapping of visual signals across hemifields.This task is directly analogous to the single-step saccade task used to test spatial updating in monkeys.

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We observed an initial response in the hemisphere contralateral to the visual stimulus, followed by a remapped response in the hemisphere ipsilateral to the stimulus.

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