Hill BD et al. The Neurologist. 2010; 16: 249-253
Authors validate a longstanding easy test for fine motor processing used for decades at LSU in 86 normals. Task consists of counting number of 180 degree rotations of a quarter in ten seconds by the dominant and nondominant hands. A correction for drops is used, but not that important. Task is to rotate a quarter using thumb and fingers one and two in ten seconds with an examiner using a timer and counting. If the coin is dropped, the subject gets another ten seconds. The adjusted score is the number of rotations in ten seconds minus (0.1 x rotations x drops). Traditionally, LSU has used a cut score of ten to indicate impairment. Authors believe a cut score (for both hands) of 13 is better, with increased sensitivity and some loss of specificity.