Path II final - hydrocephalus Flashcards
(39 cards)
Accumulation of CSF in the VENTRICLES of brain
hydrocephalus
CSF is produced where?
choroid plexus
function of CSF
helps brain function properly
protects from trauma
total production CSF/day?
500 ml
total csf in ventricles at one time?
150 ml
CSF flow
Lateral Ventricle -> Interventricular Foramen of Monroe -> 3rd Ventricle -> Aqueduct of Sylvius -> 4th Ventricle -> Foramen of Leuscka (Latera Aperturel) and Foramen of Magendie (Medial Aperture) -> Cisterna Magna (Direct communication with subarachnoid space of brain and cord) -> Absorbed through Arachnoid Granulations -> Superior Saggital Sinus -> Transverse Sinus -> Sigmoid Sinus -> Jugular Vein -> Away from brain
Cisterna Magna has direct communication with this area
subarachnoid space
where CSF goes to reach the brain and spinal cord
subarachnoid space
space between the arachnoid and pia mater
subarachnoid space
space around the cerebellum
cisterna magna
direct communication with the subarachnoid space of brain and spinal cord
cisterna magna
Where is CSF absorbed?
arachnoid granulations (parietal bone)
Where does CSF flow to after being absorbed?
Sup. saggital sinus
Main collector of venous blood in the brain
superior saggital sinus
Made of the cranial vault above and sides are made by 2 layers of dura mater
superior saggital sinus
Which hydrocephalus causes acute bacterial infection?
communicating hydrocephalus
could be due to benign brain tumors with in the choroid plexus
communicating hydrocephalus
accumulation of extra fluid in brain due to increased production of CSF(or decreased absorption)
communicating hydrocephalus
has normal communication with structures of the brain
communicating hydrocephalus
An obstruction prevents CSF from moving out
due to Leptomeningitis or Brain Tumor or stroke (leads to increase in intracranial pressure)
non-communicating hydrocephalus
Swelling of Arachnoid Granulation
Causes increased accumulation (absorption) of CSF WITHIN VENTRICLES
leptomeningitis
Leads to headache- Gyri jam up against the skull and become flattened
leads to headache-gyro jam up against the skull and become flattened
Often of Pituitary Gland
Causes large cyst in the brain that CANNOT BE REMOVED
Causes obstruction of CSF flow
Leads to increased ICP
Tumor and Non-Communicating Hydrocephalus
3 Major Signs/Manifestations of Hydrocephalus
1) Headaches (often brain tumor)
2) Nausea/Vomiting
3) Papilledema (optic disc swelling)