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.
The most likely cause of sweaty palms, as well as other types of hyperhidrosis, is an overactive sympathetic nervous system. The sympathetic nervous system manages all sorts of functions in the body that make up what is commonly termed the fight-or-flight response; this includes the release of a number of chemicals such as adrenaline, increasing heart rate, constricting blood vessels, and of course, sweating.