22 terms

Ch 7 key terms

Central nervous System
annulus fibrosus
tough, outter covering of disks that cushion movement of the vertebral column.
blood-brain barrier
the special functioning of the cerebral capillaries that prevents the passage of unwanted substances into the brain
Brain abscess
an encapsulated accumulation of pus w/in the cranium resulting from a cranial infection, penetrating head wound, or an infection spread thru the blood stream.
cervical spondylosis
osteoarthritic condition that affects the vertebral column, leading to nerve disorders caused by chronic nerve root compression
inflammation of the brain tissue. viral spread by mosquitoes or the herpes vrus. More serious than meningitis.
most common type of brain tumor, derived from glial (supporting cells) but classification is unsettled. account for about 1/2 of all primary brain tumors.
herniated nucleus pulposus
herniation of the inner portion of the disk thru a rupture in the annulus fibrous ( the tough outter covering)
congenital or acquired condition resulting from accumulation of cerebrospinal fluids in the ventricles of the brain & leading to ventricle enlargement, compression of brain tissue, & increased intracranial pressure.
soft, infiltrating tumors of brain epithelial tissue that are highly malignant & grow rapidly.
most common nonglial tumor. slow growing/benign tumor of the arachnoid tissue.
inflammation of the meninges causeed by bacteria (most common) or a virus.
protrusion of the spinal cord & meninges thru a defect of the skull or vertebral column.
multiple sclerosis
chronic, progressive disease of the CNS between the ages of 20 & 40, characterized by demyelination of the nerve sheath & white matter.
a tumor of peripheral nerves caused by abnormal prolliferation of Schwann cells.
nucleus pulposus
the pulpy center of the intervertebral disks
pituitary adenoma
benign tumor of the pituitary gland.
transient ischemic attacks (TIA)
a temporary episode of neurological dysfunction that can precede a CVA (Shock).
Ischemic CVA
blood clot blocks the blood vessels to the brain. (most common type of CVA). Diagnoised by MRI
Hemorrhagic CVA
vessels in the brain rupture & bleed. (a more sudden onset of CVA's) Diagnoised by CT Scan.
An Ischemic stroke can occur in which 2 ways?
from a thrombus (a clot in a cerebral artery) or from an Embolus (an embolism to the brain from a clot elsewhere in the body.)
a blood clot
a mass of undisolved matter present in a blood vessel brought there by blood current