The EN model. (a) Example OPM (color code) together with a uniform map of visual space (RM) (grid lines). (b) Position s
) and orientation θ of a 'pointlike' stimulus. (c) Cortical activity, evoked by the stimulus in b for the model maps in a. Dark regions are activated. Note, that in contrast to SOFM models, the activity pattern does not exhibit a stereotypical Gaussian shape. (d) Modification of orientation preference and retinotopy, caused by the stimulus in b. Orientation preferences prior to stimulus presentation are indicated with grey bars, after stimulus presentation with black bars. Most strongly modified preferences correspond to thick black bars. Modifications of orientation preferences and retinotopy are displayed on an exaggerated scale for illustration purposes.