Fig. 8.

Modelling grand averaged data with the winning model.

The left panel displays the posterior expectations of the modulation (log scaling) of the self- and forward connectivity by noisy target motion in the winning DCM (Fig. 7) of the grand averaged MEG data. On average, noisy motion induces a disinhibition of central V1 and left cuneus (peripheral V1), but increased self inhibition of right cuneus. In addition, noisy motion diminishes forward connectivity from central V1 but increases it from peripheral V1. Grey and blue arrows denote excitatory connections, balls denote inhibitory connections. Cun — cuneus (peripheral V1).

The right panel illustrates a possible reason for the laterality of the V1 gain (self-inhibition) changes: because on average subjects' eyes are ahead of the target (in both Smooth and Noisy conditions) when it emerges from the occluder (around 3000 ms on Fig. 5, left panel), its image is concentrated in the right hemifield and hence left visual cortex.