
Human senses 79
Figure 3.25 Illusion of movement (as per Roll et al., 1986)
movement felt when another train is leaving. Giving illusion of movement only by
vision can create conflicts between the different systems acting in the real environment
and can even, as was noted, lead to simulator sickness.
We would like to mention that it is possible to artificially create sensory messages
of movement of a lower limb by applying a 70 Hz vibration at the hamstring and
quadriceps, when the subject is at rest and has closed his eyes. Figure 3.25 shows this
position.
Though physiological knowledge makes it possible to counterfeit kinaesthetic sen-
sations, the ...