The arachnoid mater covering the brain is referred to as the arachnoidea encephali, and the portion covering the spinal cord as the arachnoidea spinalis.. The arachnoid and pia mater are sometimes considered as a single structure, the leptomeninx, or the plural version, leptomeninges. (Lepto- from the Greek root meaning thin). Similarly, the dura in this situation is called the pachymeninx.
Sweaty Hands Excessively sweaty hands are caused by the condition known as hyperhidrosis. Palmer (palm of the hand) hyperhidrosis is caused by a hyperactive sympathetic nervous system causing sweat glands in the hands to produce an excessive quantity of sweat.
Multiple sclerosis is a disease of the central nervous system that affects muscle coordination and can lead to finger spasms. A muscular disease called Myopathy is the weakening of the muscles that may include the fingers. Overconsumption, or withdrawal, of caffeine can cause the muscles to twitch. Excessive exercise can take its toll on the muscles of the fingers, causing pain and twitching.