The condition of the arachnoid membrane becoming inflamed. The duramater (outermost), the arachnoid (middle), and the piamater (innermost) are the three membranes that cover and protect the spinal cord and brain.
The condition of the arachnoid membrane becoming inflamed. The duramater (outermost), the arachnoid (middle), and the piamater (innermost) are the three membranes that cover and protect the spinal cord and brain.