Synapses (IMAGE) Johns Hopkins Medicine Caption Long-term stability of the structure of synapses (magenta) and the expression of neurotransmitter receptors (yellow) at synapses in the brain. Arrows and arrowheads mark the same synapses imaged in live mice over four weeks. Credit Johns Hopkins Medicine 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.