1981, W. Odling-Smee, Alan Crockard, Trauma care:In this case, the force is more generally applied over the skull causing the vault to inbend and fracture, while solid irregular struts such as the petrous bones will not fracture, ...
1991, Hans O. Doerr, Albert S. Carlin, Forensic neuropsychology:At impact the skull decelerates first and begins to inbend, creating a positive force meeting the positive force of the forward-moving brain at the site of impact.