Birds (IMAGE) UT Southwestern Medical Center Caption A study demonstrates that a zebra finch's song can be altered -- to the syllable -- by activating and deactivating a neuronal pathway responsible for helping the brain determine whether a vocalization is performed correctly. The finding provides insight into how these neurons may guide the learning of vocal behaviors in humans. Credit UT Southwestern Medical Center Usage Restrictions None 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.