“…The sense of limb movement was evaluated as described by Roosink et al 27,28 First, results obtained with the 2-alternative forced choice paradigm (greater = 1, smaller = 0) were plotted against the 13 scaling factors (log-transformed to be on a linear scale). Second, a sigmoid curve (1), with initial values X Y.50 = 0, constraints Y MAX = 1 and Y MIN = 0, and a variable slope (m), was fitted to the data using Prism 6 for Windows (GraphPad Software, La Jolla, CA):…”