Possibility of guiding arm movement in circle drawing

We tried to guide human action using galvanic vestibular stimulation (GVS). GVS has a possibility of human behavior guidance without any attention. We tried to guide the trajectory of the subjects´ hands when as the continuously drew circles. Previous work has mainly dealt with unstable actions, such as walking and reaching in a standing posture. On the basis of the results, it was claimed that GVS is effective for human action guidance. However, in those experiments, GVS influenced just the perception of the direction of gravity direction and balancing. Clarifying the GVS effect for actions performed with stable postures is required. In this work, we verified the effects of GVS with a stable sitting posture under a head-fixed condition in continuous circle drawing as a guided action. The results showed that there are cases in which the hand is guided by GVS. This means that there is a possibility of guiding hand trajectory by GVS even with a stable posture where GVS cannot drastically change balance perception.