Areas Involved in Encoding and Applying Directional Expectations to Moving Objects

摘要: Two experiments used functional magnetic resonance imaging (fMRI) to examine the cortical areas involved in establishing an expectation about direction of motion upcoming object and applying that analysis object. In Experiment 1, subjects saw a stationary cue either indicated subsequent test stimulus (directional cue) or provided no directional information (neutral cue). Their task was detect presence coherent stimulus. The produced larger modulations than neutral cue, with respect passive viewing baseline, both motion-sensitive such as left MT+ anterior intraparietal sulcus, well motion-insensitive posterior sulcus junction medial precentral superior frontal sulcus. 2 event-related fMRI technique separate signals during period, which encoded maintained, from applied Cue period activations stationary, included many same -insensitive 1 directionally specific modulations. Prefrontal were not observed even though had be translated into format appropriate for influencing detection, this maintained duration (approximately 5 sec).