Ventricular System Flashcards
Type of ventricles
2 lateral ventricles
3rd ventricle
4th ventricle
Structure producing csf
Choroid plexus
Liquid in ventricles
CSF
Embryologie origin of ventricle
Neural canal of neural tube
How are lateral and third ventricle formed
Neural canal dilation in prosencephalon
Origin of cerebral aqueduct
Cavity of mesencephalon
Origin of fourth ventricle
Neural canal dilatation in rhombencephalon
Choroid plexus origin
Tuft of capillaries invaginate roofs of prosencephalon and rhombencephalon
Largest ventricle
Lateral ventricles
Divisions of lateral ventricles
Body
3 horns
Connection of lateral ventricle to 3rd ventricle
Interventricular foramina
Part of lateral ventricle with choroid plexu s
Body
Temporal horn
Connection between thrid and 4th ventricle
Cerebral aqueduct
Location of fourth ventricle
Posterior to pons and upper medulla oblongata
Anterior inferior to cerebellum
Floor of fourth ventricle
Rhomboid fossa
Connection between fourth ventricle and subarachnoid space
Lateral foramen of luschka
Foramen of magendie ( midline )
Csf flow factors
Hydrostatic pressure
Arterial pulsation of large arteries
Directional beating of ependymal cilia
Csf volume in communicating system
150 ml
Production rate of csf
20ml/h
Amount of csf produced and absorbed daily
400-500ml
Normal pressure in CSF
5-15 mmHg
Functions of CSF
Support brain during evolution
Protection against external trauma
Remove metabolites from neuronal and glial cell activity
Transport of active substance like hormones and neuropeptides
3 main barriers of BBB
Vascular endothelial barrier
Blood-CSf barrier
Subarachnoid barrier -
BBB functions
Prevent entry of harmful substances into CNS
Maintain Ion and volume regulation
Maintain Metabolic and immunologic function
Intracranial pressure components
Brain parenchyma
Intracranial CSF
Cerebral blood volume
Condition in which there is increased ICP
Neoplasia
Hemorrhage
Inflammation
Hydrocephalus
Hydrocephalus types
Communicating
Non communicating
Congenital hydrocephalus
Dandy walker syndrome
Chiari malformation
Congenital brain tumors (choroid plexus papillloma )
Hydrancephaly
Hydrocephalus presentation in infants
Irritability Lethargy Poor feeding Vomiting Failure to thrive
Adults hydrocephalus presentation
Headache
Vomiting
Diplopia
Papilledema
Management of hydrocephalus
Conservative Surgical (shunting and endoscopic 3rd ventriculostomy)
