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40 Cards in this Set
- Front
- Back
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meningeal layer cover (3)
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brain, spinal cord, central portion of cranial nerves
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meninges compose of 3 membranes
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- dura mater
- arachnoid mater - pia mater |
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2 parts of dura mater
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- endosteal layer
- meningeal layer |
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real dura mater
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meningeal layer
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meningeal layer cover
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BRAIN AND SPINAL CORD
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type of membrane of meningeal layer
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strong fibrous membrane
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type of membrane of arachnoid
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delicate, impermeable membrane (spinal web)
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what are in subarachnoid space
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- cerebral arteries
- veins - cranial nerves |
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type of membrane of pia mater
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vascular membrane
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meningeal layer form wat to divide cranial cavity into 3 compartments
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septa
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3 compartment in cranial cavity
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left hem, right hem, cerebellum/brainstem
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infolding of dura form additional space, occupied by
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venous sinuses
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function ofsepra with movement ofhead
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restrict displacement of brain associate with movement of head
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Meningitis
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inflammation of meninges, cause by viral or bacterial in subarachnoid space
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most common side effect of meningitis that is permanent
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sensory neural hearing loss (bilateral, mild to profound, flat or high freq)
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what hearing disease coexisting or precedin meningitis
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otitis media
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ventricular system
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network of fluid filled cavities in the brain and spinal cord
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what fluid filled cavities in brain and spinal cord
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cerebrospinal fluid (CSF)
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3 ventricles
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- lateral (c shape)
- third - fourth (tent shape) |
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where is lateral ventricles
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--> one in each cerebral hemisphere
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third ventricle
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cleft between left and right halves ofthalamus
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location fourth ventricle
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space between third and central canal of spinal cord
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what connect between 3rd and 4th
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cerebral aqueduct of sylvius
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central canal of spinal cord extend from and to ?
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from inferior medulla oblongata to terminal ventricle in the conus medularis of spinalcord
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CSF ciculate thru
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1 ventricles
2 subarachnoid space |
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where is CSF created
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choroid plexuses of lateral, third, and fouth ventricles
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CSF is absorbed into
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venous sinuses trhough arachnoid granulations
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lipid soluble substances (alcohol) enter brain by
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diffusion of CSF into brain substance
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3 functions of cns
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1 protect CNS from mechanical trauma
2 regulate intracranial pressure 3 remove waste products and have nutritive function |
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an abnormalincrease in CSF within skull
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hydrocephalus
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what are 2 cause for CSF pressure to rise
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1. blocked circulation of CSF at cerebral aqueduct called congenital aqueductal stenosis
2. overproduction of CSF (choroid plexuses) / diminished absorption of CSF (arachnoid granulation) |
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what is a symptom of newborns with hydrocephalus
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enlarged headbecause skull is not closed
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how to treat hydrocephalus
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with shunts or selective destruction of choroid plexus
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CSF color
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pink - presence of blood
yellow- increase protein content (tumor) cloudy or white - increase WBC (infection such as meningitis) |
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contracoup injury
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severe or repeaed blows to head
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result from severe or repeated blows to head
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1 cushioning by septa and CSF are overcome --> bain make contact with opposite side of skull
2. produce intracanial hemorrphage |
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result from repeated blows to front of head
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- damge to posterior occipital and cerebellar lead to
1 ataxia 2 dysarthria 3 partial blindness |
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dysarthria
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lack of coordination of muscles of artic, speech
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ataxia
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lack of coordination of limbs
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what type of damage is more common in premature infants
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intraventricular hemorrphage
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