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.
Rheumatoid arthritis and osteoarthritis are the two most common types of arthritis in the hand. Repetitive motion injuries, including carpal tunnel syndrome, can cause pain in the wrist and hand. Tumors of the structures in the hand are a very rare cause of hand or finger pain. Certain conditions such as diabetes can cause damage to the nerves, resulting in pain, numbness, or tingling of the arms and legs.