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bone
cranial bone protects brain, vertebrae protects spinal cord |
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| serves as outer layer of meninges and also inner periosteum of cranial bone; strong, white, fibrous tissue |
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| middle. delicate, cobwebby layer |
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| innermost layer; adheres to brain and spinal cord and contains blood vessels |
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| infection of meninges; most often involves the arachnoid and pia mater; most often caused by meningococcal bacteria; symptoms include fever, sever headache, neck stiffness and pain |
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additional protection, cushion of fluid found around brain and spinal cord
reservoir of circulating fluid which is monitored by the brain to detect changes in the internal environment (CO2 & blood pH) |
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| CSF is found in the ______ |
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| subarachnoid and ventricles |
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| space around brain and spinal cord |
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fluid filled spaces within the brain
4 total |
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| thin, vertical pocket of fluid below and medial to lateral ventricles |
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| tiny, diamond shaped space located between cerebellum and brainstem |
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| forms by seperation of fluid from blood in the choroid plexuses, a network of capillaries that project from pia mater into the four ventricles |
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| fluid is formed and then circulates around brain and spinal cord; fluid is absorbed back into venous blood via arachnoid vili |
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| withdraw of CSF from subarachnoid space in lumbar region of spinal cord; done for various purposes |
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| results from the blockage of the CSF circulation, usually in the cerebral aqueduct; fluid builds up, ventricles swell and pressure is applied to brain; treated surgically with a shunt |
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