The Neuromuscular Junction (IMAGE) University of Basel Caption The neuromuscular junction (NMJ): innervation of the acetycholine receptors (green) on the muscle fiber by the motor neuron (red). Credit Image: University of Basel, Biozentrum 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.