(MRI) A medical imaging technique frequently used in radiology providing detailed images of internal anatomical structure and limited function of the body. Functional MRI...

(MS) A disease in which the myelin sheaths around the neuron axons of the brain and spinal cord are damaged, leading to demyelination and scarring of the neuron. This can cause the progression...

The innermost membrane of the meninges. A thin delicate layer which covers the brain (even following its contours into the sulci and gyri). Lies deep to the subarachnoid space.

The interval which lies between the pia mater and arachnoid membrane. Contains CSF and a spongy tissue consisting of trabeculae (connective tissue filaments joining the two layers).

Area above and behind the brain within the dura mater which allows veins to span the area. The the veins lie immediately next to arachnoid villi, and are considered to be a major site of...