BRAIN BLEEDS 

Brain bleeds can result from trauma to the head (car crash, fight, fall). Trauma can fracture the skull, creating sharp bone fragments that can lacerate blood vessels running along the inside of the skull. The brain has very little free real estate. When you introduce a new pressure inside the skull (like blood), it will compress the healthy brain tissue, swiftly killing it. 

Brain bleeds show up well on CT scans -- which is unusual -- most brain pathologies are best visualized with an MRI!

The inside of the skull is coated with a few different layers of connective tissue (dura, arachnoid, pia). Blood vessels are sandwiched between these layers. We classify bleeds by which layers are involved. YOU MUST RECOGNIZE THE RADIOLOGY.