I was screened a month ago for autoimmune diseases and had blood work done,with an MRI ans Catscan,,,two of the physical test that my dr's did was,he had me hold my arms straight out in front of me while seated,,[palms facing downward],,then flex your wrists fingertips down and hold that postion,,if M>S is present,,your hands will start flapping,,before i had the tests run,,they thought that i had MS,,,bobber