The brain is well-protected by the skull, membranes, and cerebrospinal fluid, but traumatic brain injuries (TBI) can still occur due to significant impacts. These injuries range from mild concussions, which typically heal with rest, to severe TBIs that may cause unconsciousness, coma, or even death. TBIs can be classified as closed, where the skull remains intact, or open, where an ob... https://www.medicalcarereview.com/news/all-about-brain-injuries-and-concussions-nwid-645.html