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.
These are common conditions caused by mistakes in the turnover of normal cells in the hand. They are almost always benign but sinister lumps (cancer) can occur (although < 1% of hand lumps are cancerous). The typical symptoms are of a slow growing painless lump in the hand, most commonly a finger, that comes on for no obvious reason. As the swelling enlarges it can become a nuisance with daily activities. Lumps at the bottom of the fingers and in the palm mainly cause problems with gripping. Lumps at the ends of the fingers tend to cause awkwardness with fine activities. The lumps tend to be solitary, i.e. not associated with lumps elsewhere. Rarely there will be some numbness or pain associated with the swelling.