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.
Anything that reduces blood supply to the nerves of the hand can produce finger numbness. Take carpal tunnel syndrome, for example. It causes swelling (or a change in position) of tissue within the carpal tunnel, which, in turn, irritates the median nerve. The result is finger tingling and numbness. Other conditions responsible for finger numbness include arthritis, multiple sclerosis, peripheral neuropathy and pinched nerve. Permanent or severe blood loss (ischemia) in the hand and fingers can result in permanent nerve damage and numbness. Nerves in the fingers may be damaged, for example, when blood supply is decreased over time, such as in diabetes.