Why Would Your Doctor Want to Do a Spinal Tap

Multiple Choice

Why would your doctor want to do a spinal tap if she suspected that you had an infection of the brain?​ 

A) Because the cerebrospinal fluid (CSF) of the spinal cord is continuous with the cerebrospinal fluid (CSF) of the brain. 
B) Because the spinal cord is part of the central nervous system. 
C) Because the peripheral and central nervous systems are connected. 
D) She wouldn't do a spinal tap because the spinal cord is made of different kinds of neurons than the brain.