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.
1 Deficiency of certain minerals such as magnesium and calcium may be a reason for twitching of fingers. 2  Poor dietary intake of these nutrients is generally suspected to be a cause. 3  Dehydration resulting from excess loss of body fluids. 4  It results in imbalance in electrolyte content in the body.