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. 2000 Aug 9;11(1):33–45. doi: 10.1002/1097-0193(200009)11:1<33::AID-HBM30>3.0.CO;2-C

Figure 1.

Figure 1

Schematic illustrations of the visual stimuli and a diagram of MEG acquisitions. Visual stimulus to induce apparent motion (AM) was created by the two frames; One (Frame 1) with a fixation point and a bar offset 2 degrees (visual angle) from that point, the other (Frame 2) with a fixation point at the same location as in Frame 1 and a bar offset 1 degree from that point. Two visual scenes were used for the random dot cinematogram (RDC), with stationary dots (Frame 1) the other with coherently moving dots (Frame 2). For both visual stimuli, Frames 1 and 2 were presented alternately for 2 to 3 seconds with an interstimulus interval (isi) of 16 ms. Trigger pulses for the averaging of magnetic responses occurred whenever the frame changed. Acquisition of the magnetic responses started 50 ms before and ended 500 ms after the trigger pulse.