Corollary discharge is significant in terms of accounting for behavior in that it accounts for greater variability in terms of behavior. That is, without corollary discharge the nervous system appears to be made up of many CPGs that respond to input by producing or not producing some behavior. With corollary discharge, the nervous system seems more complete as it can now account for its actions in terms of communicating between CPGs. Thus, more complex behaviors can be account for as the nervous system can now supply itself with the input of its own actions.
A good general point. Have in mind some concrete illustrations? From in class but also from your own experiences, thoughts? PG