During concussion (a type of traumatic brain injury) the brain will move within the cranial cavity. Damage is caused to the brain as it crashes into parts of the bony cavity walls. Ironically one of the bone markings that can cause serious damage to the brain is the . This is ironic because one of the functions of this bone marking is to .A- pterygoid processes; anchor important chewing musclesB- crista galli; attach to the dura matter holding the brain in placeC- styloid process; attach to and support the hyoid boneD- perpendicular plate; separate the left and right halves of the nasal cavity