NROB60H3 Chapter Notes - Chapter 7: Dura Mater, Subarachnoid Space, Anterior Communicating Artery
1 Sep 2016
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Document Summary
Week 3 development of the nervous system. Ensures that the brain is not in direct contact with overlying bone of skull: comprised of three layer of connective tissue membranes. Subarachnoid space the space between the arachnoid and pia meter, filled with cerebrospinal fluid; in a sense, because of this layer, the brain is floating within the skull. Site of major blood vessels which penetrate substance of the brain: consequences of damaged meninges. Subdural hemorrhage/hematoma a dangerous condition that increases cranial pressure and damages brain tissue that happens when blood vessels passing through the dura are ruptured and collect in the arachnoid membrane. Treated by drilling a hole in the skull and draining the blood. Subarachnoid hemorrhage/hematoma rupturing of a cerebral vessel of pia mater. There is only so much space in the brain and when a blood vessel ruptures, the blood pools this creates excessive pressure in the brain. Critical ions involved in neuron electrical activity.
