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) perpendicular plate; separate the left and right halves of the nasal cavity
B) pterygoid processes; anchor important chewing muscles
C) crista galli; attach to the dura matter holding the brain in place
D) styloid process; attach to and support the hyoid bone

Question

Quizplus · Accepted Answer

The crista galli is a small bony ridge that projects upwards from the ethmoid bone, which forms the roof of the nasal cavity and the floor of the cranial cavity. The crista galli attaches to a fibrous membrane called the falx cerebri, which separates the two hemispheres of the brain and holds it in place. During a concussion, the brain can move violently within the cranial cavity and collide with the crista galli, causing damage to the delicate structures of the brain. This is ironic because the crista galli is one of the structures that is meant to keep the brain in place and protect it from injury.

During Concussion (A Type of Traumatic Brain Injury) the Brain