PHYSIOLOGY Flashcards
what is the epithelium called that produces cerebrospinal fluid (CSF)
choroid plexus secretory epithelium
name all the places where CSF production occurs (5)
lateral ventricles 3rd ventricles 4th ventricles subarachnoid space circumventricular organs
how much CSF is made in a day
how much CSF can the CNS hold
how many times is CSF replaced per day
600ml
150ml
replaced 4 times every day
what is the CSF mainly made of
what other 2 things are there in it (but not in significant amounts)
water
proteins
immunoglobulins
where does CSF production start
lateral ventricles (anterior, inferior and posterior horns)
where does CSF go after lateral ventricles
3rd ventricle
where does CSF go after 3rd ventricle
4th ventricle
where does CSF go after 4th ventricle
subarachnoid space
where does CSF go after subarachnoid space
reabsorbed into dural venous sinuses (venous blood)
where is the subarachnoid space between
pia and dura matter
what is the function of CSF
to exchange things between blood and brain tissue (eg water, amino acids, ions, removes metabolites)
buoyancy for brain (it floats in it) = shock absorption to protect it
how can you obtain CSF
where specifically
lumbar puncture at L3/4 or L4/5 (no spinal cord nerves here)
by which embryological process are the choroid plexuses made
invagination
what is the connection between the lateral ventricles and the 3rd ventricle
interventricular foramina of munroe
what is the connection between the 3rd and 4th ventricles
cerebral aqueduct of sylvius
