Nerves Affected By Degeneration (IMAGE) Salk Institute Caption Left: Mouse nerves show tight bundling and orderly patterning facilitated by normal Schwann cells. Middle: Nerves without Schwann cells but with acetylcholine experience degeneration from the blood-clotting protein thrombin. Right: Nerves lacking both Schwann cells and acetylcholine are unable to individually bundle axons but do not undergo axon degeneration. Credit Salk Institute Usage Restrictions with credit and related coverage. 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.