NROC64H3 Chapter Notes - Chapter 21: Thalamus, Saccade, Muscimol
Document Summary
Attention= state of selectively processing simultaneous sources of information enables us to concentrate on one object over many others in our visual field interactions btwn modalities also occur. Cortical activity is altered by the attention we exert. Effects of attention can be seen in sensory areas from are v1 to visual corical areas in the parietal and temporal lobe experiments show the consequences of giving attention to a location or a feature. Enhancements in detection and reaction are selective for spatial location. Fmri shows that there may be selective changes in brain actiitvty associated with spatial shifts in attention. Fmri results are consistent with the behavioral observation that visual attention can be moved independently of eye position. We are able to pay particular attention to visual features such as color to enhance our performance. Evidence suggests that both cortical and subcortical structures may be involved in modulated the activity of neurons in areas of sensory cortex.
