Trephination (IMAGE) Brown University Caption a-b: Magnified edges of the trephination, each with a 2 mm scale bar. c: All four edges of the trephination, scale bar is 1 cm. d: Reconstructed location of trephination on head. Credit Rachel Kalisher et al Usage Restrictions For noncommercial news use only License Original 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.