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

crista galli; attach to the dura matter holding the brain in place

Explanation:

The ethmoid bone is located on the viscerocranium axis (skeleton of the face) in its anterior region. This bone is characterized by its short and light shape with a spongy structure. It has a complex and peculiar anatomy, consisting of two blades and a series of mazes. The lamina called cibriform has a small prominence in its superior region, called Crest galli. This prominence bears this name because it resembles a rooster crest. In addition, the galli crest is responsible for attaching to hard matter holding the brain in place, which can be ironical because the galli crest can cause damage to the brain that has left the place.

the  different  of  these  two  are  that  they  differently  handle  their  team.

an  expressive  leader  focuses  on  the  task  at  hand  and  make  sures  that  their  goal  is  achieved.  they  accurately  finish  the  task.  an  instrumental  leader  on  the  other  hand  works  on  the  unity  of  the  group,  they  care  more  about  their  employees.  all  the  while  creating  a  good  environment.