Fast-Spiking Interneurons (IMAGE) Duke University Caption A highly magnified view of the striatum of a mouse brain reveals a relatively rare type of cell called the fast-spiking interneuron (purple), which is responsible for orchestrating the brain circuits that control our habits. Credit Justin O'Hare, Duke University Usage Restrictions with credit 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.