Corticobasal Ganglia Projecting Neurons Disrupted (IMAGE) Hokkaido University Caption The neurons connecting the motor cortical area and the basal ganglia in the brain were disrupted using viral toxins (left: normal, right: disrupted). This interrupted normal song learning in juveniles but not adults. (Miguel Sánchez-Valpuesta et al., PNAS, October 21, 2019) Credit Miguel Sánchez-Valpuesta et al., <em>PNAS</em>, Oct. 21, 2019. Usage Restrictions This image is copyrighted and can be used for reporting this research work without obtaining a permission if credited properly. 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.