VENTRICULAR SYSTEM Flashcards
CSF FLOW
LATERAL VENTRICLE - interventricular foramen or Foramen of Monroe - 3RD VENTRICLE - Aqueduct of Sylvius or Iter - 4TH VENTRICLE - Foramen of Magendie and Luschka - SUBARACHNOID SPACE - arachnoid villi - superior sagittal sinus - tansverse sinus - sigmoid sinus - internal jugular vein
Clear, colorless fluid produced mainly by the choroid plexuses of the lateral, 3rd and 4th ventricle
Some originates from the ependymal cells lining the ventricles
Located in the SUBARACHNOID SPACE
Rate of production - 0.5 ml/min
Pessure - 60 to 150mm of water
Total volume - about 130 to 150ml
Cerebrospinal fluid
CSF functions
Cushions and protects the CNS from trauma
Provides mechanical bouyancy and support for the brain
Nourishes the CNS
Removes metabolites from the CNS
Serves as a reservoir and assists in the regulation of the contents of the skull
Serves as a pathway for Pineal secretions to rech the Pituitary gland
Physical characteristics and composition of CSF
Appearance: clear and colorless
Volume: 130ml
Bite of production: 0.5ml/min
Pressure: 60-150mm of water
Protein: 15-45mg/100ml
Glucose: 50-85mg/ 100ml
Chloride: 720-750mg/100ml
Number of cells: 0.3 lmyphocytes/cu mm
Consists of:
LATERAL VENTRICLE - in each cerebral hemisphere
3RD VENTRICLE - in the diencephalon
4TH VENTRICLE - in the hindbrain (between the cerebellum and pons/medulla)
