Figure 1.
Schematics of stimulus sequences and electrode locations on fingertips.
(a) Schematics of the four stimulus train types. All pulse widths are amplitude modulated to subject perceptual threshold for a particular stimulation site. Color is indicative of the stimulation site and/or train type. (b) Diagram of electrode locations on fingertips.
Figure 2.
Percentage of trials where subjects indicated their middle fingertip was stimulated.
Mean percentage of responses where subjects indicated that their middle fingertip had been stimulated; in response to, “Did the preceding stimulus train contain a stimulus on the middle fingertip?” Error bars indicate the standard error (s.e.m.) of each stimulus train in each posture. * indicate significant differences in subject perception of stimuli on the middle fingertip between the Illusory Rabbit and Motion Bias Trains for a particular posture as determined via Fisher LSD tests, α<0.05, (a) All-Adducted (n = 14), (b) All-Flexed (n = 4), (c) Middle-Extended (n = 4), (d) Index-Abducted (n = 4), (e) Vulcan (n = 4), (f) All-Abducted (n = 4), (g) Index-Flexed, (h) Middle-Flexed (n = 14), (i) Ring-Flexed (n = 4), where each n represents a subject response average of 13 trials per posture and stimulus train.
Table 1.
Analysis of Variance for 2-Factor Factorial Design.
Table 2.
Fisher Least Significant Difference Table for Each Posture.