The central nervous system is made up of the brain and spinal cord. The brain functions to receive nerve impulses from the    more »

CSF protects the brain and spinal cord from injury by acting like a liquid cushion. CSF is usually obtained through a lumbar puncture (spinal tap). During the procedure,   more »

Cerebral spinal fluid (CSF) is a clear fluid that circulates in the space surrounding the spinal cord and brain. CSF protects the brain and spinal cord from injury by acting like a liquid cushion.   more »

A lumbar puncture, or spinal tap, is a procedure to collect cerebrospinal fluid to check for the presence of disease or injury. A spinal needle is inserted, usually between the 3rd and 4th lumbar vertebrae in the lower spine. Once the needle is   more »

 

 

Normal Conduction in Myelinated Nerve Fiber

 

 

 

 

 

 

Conduction in a Demyelinated Nerve Fiber-KH

This slide shows abnormal conduction in a nerve fiber in demyelinating diseases.