Suggested models for open-and closed-loop experiments. MayeAlexander HsiehChih-hao SugiharaGeorge BrembsBjörn 2007 <p>A–Open-loop model as proposed in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0000443#pone-0000443-g001" target="_blank">Fig. 1b</a> (for the <i>openloop</i> group). B–Closed-loop model (for the <i>onestripe</i> and <i>uniform</i> groups). Performance in a situation with a closed reafferent feedback loop is commonly modeled with a state estimator, cross-correlating sensory input with recent motor commands via an efference copy (EC). Such an evaluation is required for efficient behavioral control of incoming sensory data.</p>