Fine Tuning in the Brain (IMAGE) Bernstein Coordination Site (BCOS) Caption The connections between nerve cells that react to similar stimuli are strengthened as they gain visual experience (thick lines), while other connections are weakened (thin lines). Credit Stefan Rotter / Bernstein Center Freiburg, 2015 Usage Restrictions Copyright must be provided. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.