The application of vibration stimulation to muscles, via the skin surface, can generate the sensation of movement, when actually there is no motion. This phenomenon is called kinesthetic illusion. Recently, in the fields of rehabilitation and virtual-reality technology, research has been conducted to utilize kinesthetic illusions to feel body movements, when there are none. To apply kinesthetic illusions in the above fields, it is necessary to develop techniques to improve the occurrence rates of the kinesthetic illusions and shorten the latency, which is the time lag from the onset of stimulation to the occurrence of the illusion. In a previous study, the authors reported that the occurrence rate of kinesthetic illusion could be improved by simultaneously applying vibration and electrical stimulations to the antagonistic muscles. In this study, the influence of this technique on the latency of the generated kinesthetic illusion is investigated by applying a combination of vibration and electrical stimulations. Three different electrical-stimulation voltages are used in the combined stimulation to induce the kinesthetic illusion, and the latency is studied for each voltage condition and the vibration-only condition. The effects of the voltage change on latency are evaluated from a regression analysis performed using the generalized linear mixed model. The results suggest that the change in the electrical stimulation voltage can shorten the latency of kinesthetic illusion.

1. [1] C. T. Leonard, “The Neuroscience of Human Movement,” Mosby, 1998.
2. [2] J. P. Roll and J. P. Vedel, “Kinaesthetic role of muscle afferents in man, studied by tendon vibration and microneurography,” Experimental Brain Research, Vol.47, No.2, pp. 177-190, 1982. https://doi.org/10.1007/BF00239377
3. [3] J. P. Roll, J. P. Vedel, and E. Ribot, “Alteration of proprioceptive messages induced by tendon vibration in man: a microneurographic study,” Experimental Brain Research, Vol.76, No.1, pp. 213-222, 1989. https://doi.org/10.1007/BF00253639
4. [4] J.-P. Roll, F. Albert, C. Thyrion, E. Ribot-Ciscar, M. Bergenheim, and B. Mattei, “Inducing Any Virtual Two-Dimensional Movement in Humans by Applying Muscle Tendon Vibration,” J. of Neurophysiology, Vol.101, No.2, pp. 816-823, 2009. https://doi.org/10.1152/jn.91075.2008
5. [5] Y. Umesawa, K. Doi, and H. Fujimoto, “Development and Evaluation of a Device for Inducing Kinesthetic Illusion of Dual Joint Movements,” J. Adv. Comput. Intell. Intell. Inform., Vol.21, No.4, pp. 737-743, 2017. https://doi.org/10.20965/jaciii.2017.p0737
6. [6] K. Akahori, M. Ohka, H. Karakawa, M. Honda, and T. Miyaoka, “Development of a desktop inducing and evaluation system of kinesthetic illusion,” Trans. of the JSME, Vol.80, No.820, pp. 1-12, 2014 (in Japanese). https://doi.org/10.1299/transjsme.2014trans0350
7. [7] M. D. Rinderknecht, “Device for a novel hand and wrist rehabilitation strategy for stroke patients based on illusory movements induced by tendon vibration,” Proc. of the Mediterranean Electrotechnical Conf. (MELECON), Vol.115, pp. 926-931, 2012. https://doi.org/10.1109/MELCON.2012.6196579
8. [8] M. D. Rinderknecht, Y. Kim, L. Santos-Carreras, H. Bleuler, and R. Gassert, “Combined tendon vibration and virtual reality for post-stroke hand rehabilitation,” 2013 World Haptics Conf. (WHC 2013), pp. 277-282, 2013. https://doi.org/10.1109/WHC.2013.6548421
9. [9] E. Naito, Y. Yukawa, and M. Minakuchi, “Efficacy of vibration-induced illusory movement tasks on upper-extremity motor dysfunction in stroke survivors,” The Japanese Occupational Therapy Research, Vol.40, No.2, pp. 158-166, 2021 (in Japanese). https://doi.org/10.32178/jotr.40.2_158
10. [10] K. Ushiyama, S. Tanaka, A. Takahashi, H. Kajimoto, and H. Kajimoto, “Reinforcement of Kinesthetic Illusion by Simultaneous Multi-Point Vibratory Stimulation,” SA’19 Posters, 2019. https://doi.org/10.1145/3355056.3364576
11. [11] K. Ushiyama, S. Tanaka, M. Miyakami, and H. Kajimoto, “ViBaR: VR Platform Using Kinesthetic Illusions to Enhance Movement Experience,” SIGGRAPH’20 Emerging Technologies, Virtual Event, 2020. https://doi.org/10.1145/3388534.3407304
12. [12] S. L. Franc, M. Fleury, M. Cogne, S. Butet, C. Barillot, A. Lecuyer, and I. Bonan, “Influence of virtual reality visual feedback on the illusion of movement induced by tendon vibration of wrist in healthy participants,” PLOS ONE, pp. 1-16, 2020. https://doi.org/10.1371/journal.pone.0242416
13. [13] E. Naito, H. H. Ehrsson, S. Geyer, K. Zilles, and E. P. Roland, “Illusory arm movements activate cortical motor areas: a positron emission tomography study,” The J. of Neuroscience: the official journal of the Society for Neuroscience, Vol.19, No.14, pp. 6134-6144, 1999. https://doi.org/10.1523/JNEUROSCI.19-14-06134.1999
14. [14] D. F. Collins, K. M. Refshauge, G. Todd, and S. C. Gandevia, “Cutaneous Receptors Contribute to Kinesthesia at the Index Finger, Elbow, and Knee,” J. of Neurophysiology, Vol.94, No.3, pp. 1699-1706, 2005. https://doi.org/10.1152/jn.00191.2005
15. [15] A. W. Shehata, M. I. Keri, M. Gomez, P. D. Marasco, A. H. Vette, and J. S. Hebert, “Skin stretch enhances illusory movement in persons with lower-limb amputation,” IEEE Int. Conf. on Rehabilitation Robotics, pp. 1233-1238, 2019. https://doi.org/10.1109/ICORR.2019.8779477
16. [16] K. Honda, S. Okunami, Y. Nakashima, and M. Yamamoto, “Effect of Electrical Stimulation on Vibration-induced Kinesthetic Illusion Analyzed via Statistical Models,” Biomechanisms, Vol.26, 2023 (in Japanese) (in press).
17. [17] M. Uechi, Y. Naito, D. Shin, M. Sato, and Y. Koike, “Stiffness Teaching and Motion Assist System Using Functional Electrical Stimulation and Electromyogram Signals,” J. Robot. Mechatron., Vol.16, No.5, pp. 446-455, 2004. https://doi.org/10.20965/jrm.2004.p0446
18. [18] C. Hua, Y. Nakashima, and M. Yamamoto, “On a Precise Control for MP Joint of Human Index Finger Using Functional Electrical Stimulation – Basic Characteristics of the Joint Movement –,” Proc. of the 2020 IEEE/SICE Int. Symposium on System Integration (SII 2020), pp. 1324-1327, 2020. https://doi.org/10.1109/SII46433.2020.9025817
19. [19] J. R. Lackner and A. B. Taublieb, “Influence of vision on vibration-induced illusions of limb movement,” Experimental Neurology, Vol.85, No.1, pp. 97-106, 1984. https://doi.org/10.1016/0014-4886(84)90164-X
20. [20] T. Seno, M. Ogawa, H. Ito, and S. Sunaga, “Consistent air flow to the face facilitates vection,” Perception, Vol.40, No.10, pp. 1237-1240, 2011. https://doi.org/10.1068/p7055
21. [21] R. Yahata, W. Takeya, T. Seno, and Y. Tamada, “Hot Wind to the Body Can Facilitate Vection Only When Participants Walk Through a Fire Corridor Virtually,” Perception, Vol.50, No.2, pp. 154-164, 2021. https://doi.org/10.1177/0301006620987087
22. [22] G. M. Goodwin, D. I. Mccloskey, and P. B. C. Matthews, “The Contribution of Muscle Afferents to Kinesthesia Shown by vibration induced Illusions of Movement and by The Effects of Paralysing joint Afferents,” Brain, Vol.95, pp. 705-748, 1972. https://doi.org/10.1093/brain/95.4.705
23. [23] P. Cordo, V. S. Gurfinkel, L. Bevan, and G. K. Kerr, “Proprioceptive consequences of tendon vibration during movement,” J. of Neurophysiology, Vol.74, No.4, pp. 1675-1688, 1995. https://doi.org/10.1152/jn.1995.74.4.1675
24. [24] F. Albert, M. Bergenheim, E. Ribot-Ciscar, and J. P. Roll, “The Ia afferent feedback of a given movement evokes the illusion of the same movement when returned to the subject via muscle tendon vibration,” Experimental Brain Research, Vol.172, No.2, pp. 163-174, 2006. https://doi.org/10.1007/s00221-005-0325-2
25. [25] C. Thyrion and J.-P. Roll, “Predicting Any Arm Movement Feedback to Induce Three-Dimensional Illusory Movements in Humans,” J. of Neurophysiology, Vol.104, No.2, pp. 949-959, 2010. https://doi.org/10.1152/jn.00025.2010
26. [26] P. J. Cordo, V. S. Gurfinkel, S. Brumagne, and C. Flores-Vieira, “Effect of slow, small movement on the vibration-evoked kinesthetic illusion,” Experimental Brain Research, Vol.167, No.3, pp. 324-334, 2005. https://doi.org/10.1007/s00221-005-0034-x
27. [27] T. Kuga and E. Kasuya, “Mechanism of sound production by the Chinese grasshopper Acrida cinerea (Orthoptera: Acrididae) during flight,” Entomological Science, Vol.24, No.4, pp. 410-420, 2021. https://doi.org/10.1111/ens.12493
28. [28] A. Moscatelli, M. Mezzetti, and F. Lacquaniti, “Modeling psychophysical data at the population-level: The generalized linear mixed model,” J. of Vision, Vol.12, No.11, pp. 1-17, 2012. https://doi.org/10.1167/12.11.26
29. [29] A. Moscatelli, V. Hayward, M. Wexler, and M. O. Ernst, “Illusory Tactile Motion Perception: An Analog of the Visual Filehne Illusion,” Scientific Reports, Vol.5, pp. 1-12, 2015. https://doi.org/10.1038/srep14584
30. [30] M. W. Taylor, J. L. Taylor, and T. Seizova-Cajic, “Muscle Vibration-Induced Illusions: Review of Contributing Factors, Taxonomy of Illusions and user’s guide,” Multisensory Research, Vol.30, No.1, pp. 25-63, 2017. https://doi.org/10.1163/22134808-00002544