Samples of CSF for Diagnostic Purposes are Normally Obtained by Placing

Question

Samples of CSF for diagnostic purposes are normally obtained by placing the tip of a needle in the
A) dura mater.
B) arachnoid mater.
C) epidural space.
D) subarachnoid space.
E) cerebral ventricles.

Accepted Answer

CSF is found in the subarachnoid space, between the arachnoid and pia mater, so obtaining samples from this space allows for diagnostic testing.