what is arachnoiditis
Arachnoiditis is inflammation of the arachnoid, one of the membranes known as meninges that surround and protect the nerves of the central nervous system, including the brain and spinal cord.rachnoiditis is inflammation of the arachnoid, one of the membranes known as meninges that surround and protect the nerves of the central nervous system, including the brain and spinal cord.