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Contralateral hemispheric representation of sensory inputs (the right visual hemifield in the left hemisphere and vice versa) is a fundamental feature of primate sensorimotor organization, in particular the visuomotor system. However, many higher-order cognitive functions in humans show an asymmetric hemispheric lateralization--e.g., right brain(More)
In this time-resolved functional magnetic resonance imaging (fMRI) study, we aimed to trace the neuronal correlates of covert planning processes that precede visually guided motor behavior. Specifically, we asked whether human posterior parietal cortex has prospective planning activity that can be distinguished from activity related to retrospective visual(More)
For optimal response selection, the consequences associated with behavioral success or failure must be appraised. To determine how monetary consequences influence the neural representations of motor preparation, human brain activity was scanned with fMRI while subjects performed a complex spatial visuomotor task. At the beginning of each trial, reward(More)
We developed experimental techniques to study the neural substrates of goal-directed oculomotor behavior in trained rhesus macaques using a high-field 4.7 T vertical MRI scanner. We recorded BOLD activity, eye movements, reward and timing information while monkeys performed direct and memory saccades to visual cues during GE-EPI scans. Using a saccade vs.(More)
The aim of this study was to investigate, if it is possible to detect brain activity related to motor planning and suppression with the help of Electroencephalograms (EEG), the ultimate goal being, to simultaneously measure EEG and functional magnetic resonance imaging (fMRI). Towards this end we engaged a delayed response task from an earlier fMRI study,(More)
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