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.
Swelling may be seen as well as deformity of the joints, especially finger joints in severe, chronic cases. Overgrowth of bone (hyperostosis) may be seen. Sausage digits (dactylitis) of the hands and feet are common in individuals with psoriatic arthritis. Affected joints often have a purplish discoloration. An accumulation of fluid may be seen in a joint (effusion). Nails of the affected digits may be pitted or crumbling (onycholysis). Inflammation of the outer membrane of the eyes (conjunctivitis) or the uveal tract (uveitis) may occur in up to 30% of individuals with psoriatic arthritis (Van Voorhees).