Neuromuscular Synapse (IMAGE) Virginia Tech Caption The neuromuscular junction is the synapse where motor neurons communicate with muscle to initiate voluntary movement. A healthy neuromuscular junction (yellow) is characterized by perfect apposition between the motor neuron (green) and nicotinic acetylcholine receptors on the muscle (red). This synapse is damaged early in ALS, a change believed to contribute the onset and progression of the disease. Credit Virginia Tech Carilion Research Institute 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.