Neurotransmitter change (IMAGE) University of California - San Diego Caption A group of midbrain neurons expressing acetylcholine (blue) are made to express another type of neurotransmitter, glutamate (yellow). Credit Spitzer Lab, UC San Diego Usage Restrictions Must be used in conjunction with Li/Spitzer paper on neurotransmitter switching and exercise. 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.