PSYC 741 Lecture Notes - Lecture 6: Receptive Field
Document Summary
Use eeg in conjunction with fmri to discern. Subtraction method: utilized two methods to find the difference between the results, leaving the desired data: subtraction method leaves fef area this indicates the first activation. Frontal eye fields is responsible for initiation of attention control. Cue then examine brain activity in a delayed period with nothing on screen. When attention is being controlled, activity is driven up in v1 where it will be processed controlling attention prepares brain for input: could be change in firing rates (as demonstrated in monkeys) Increase in firing rate after attention cue even though there is no stimulus. Activation of a given brain region dampens the alpha oscillations. Increases in alpha oscillations inhibits brain region activity. Attending to small sections of larger image to find a given aspect focuses attention on given area. Pop-out search: easy to find high contrast. Find a t : exogenous attention is caught by stimulus because it is salient.
