Head Trauma:Blunt (‘closed’) or caused by a penetrating missileSkull may be fractured and depressed, tearing brain coverings and brain itselfHematomas:tearing of the middle meningeal artery causes bleeding into extradural space (epidural hematoma)-as the clot explans, the brain is compressed. Coma happens hours after the blow.tearing of vein across the subdural space causes a gradual seepage of blood - subdural hematomaMeningitis: inflammation of the meninges from infection with viruses, bacteria, etc-viral meningitis is mild and self-limiting-bacterial or fungal meningitis damages cranial nerves and brain (proceeds to raised intracranial pressure, brain displacement, deathVentricles:Hydrocephalus:NSC 4366 1st Edition Lecture 2Outline of Last Lecture I. Introduction to neuroanatomy Outline of Current Lecture I. Exterior SkullII. Interior skullIII. MeningesIV. VentriclesCurrent LectureBrain Coverings:• the exterior skull consists of parietal bone, sphenoid bone, frontal bone, nasal bone, maxilla, mandible, zygomatic bone, temporal bone, and occipital bone• the skull of a newborn consists of the frontal bones, parietal bones, and occipital bone. It alsohas two fontanelles: anterior and posterior, and and 4 sutures - metopic, coronal, sagittal, andlambdoid Interior Skull:• Anterior cranial fossa: contains the frontal lobes, and forms roof of the orbit• Middle cranial fossa: contains the temporal lobe• Posterior cranial fossa: accommodates brain stem and cerebellumTwo large sheets of dura project into the cranial cavity:•Falx cerebri - divides the cerebral hemispheres•Tentorium cerebelli - is oriented horizontally, under the occipital lobes. separates cerebellum from cerebrumThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Head Trauma:• Blunt (‘closed’) or caused by a penetrating missile •Skull may be fractured and depressed, tearing brain coverings and brain itselfHematomas: • tearing of the middle meningeal artery causes bleeding into extradural space (epidural hematoma)-as the clot explans, the brain is compressed. Coma happens hours after the blow. • tearing of vein across the subdural space causes a gradual seepage of blood - subdural hematomaMeningitis: inflammation of the meninges from infection with viruses, bacteria, etc-viral meningitis is mild and self-limiting-bacterial or fungal meningitis damages cranial nerves and brain (proceeds to raised intracranial pressure, brain displacement,