Sky Blue Staining, Myelin Sheath (IMAGE) Neural Regeneration Research Caption This sky blue staining is seen in the high-density myelin sheath in the moderate-dose astragaloside IV group (5 mg/kg per day). Credit <i>Neural Regeneration Research</i> 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.