Figure 3.

Illustration of how our model produces predictive remapping behavior. Please refer to Movie S1 that shows the model simulation. We show the activity of the two LIP cell types in different maps. On the vertical axis they code retinal stimulus position; on the horizontal axis head-centered proprioceptive (PC) signal in LIP(PC) and head-centered corollary discharge (CD) in LIP(CD). Both maps are connected via the intermediate cells. The wedge points to a LIP(CD) cell which shows a predictive remapping response. (A) Network activities long before the saccade when a stimulus is presented in the present receptive field. LIP(PC) shows a joint representation of the visual signal and the proprioceptive signal, which encodes the pre-saccadic eye position. The “predictive remapping” LIP(CD) cell responds to the stimulus presented within its receptive field. (B) Network activities shortly before the saccade when the stimulus is presented in the future receptive field of the “predictive remapping” cell. In LIP(PC) a cell responds, for which the stimulus is in its normal receptive field. LIP(CD) similarly responds to this stimulus, however, due to the corollary discharge, which encodes the saccade target, the visual response in LIP(CD) is partially increased. Furthermore, the activity from LIP(PC) is projected along the dashed lines into LIP(CD) using the connection via the intermediate cells. This activity interacts with the corollary discharge leading to activity at the “predictive remapping” cell. (C) After the saccade, the receptive field of the “predictive remapping” cell has moved to the position of the future receptive field from the previous step. In LIP(CD) the evoked response includes the “predictive remapping” cell. Hence this cell responds to the same stimulus as shortly before the saccade. It shows “visual stability.”