Radiotekhnika
Publishing house Radiotekhnika

"Publishing house Radiotekhnika":
scientific and technical literature.
Books and journals of publishing houses: IPRZHR, RS-PRESS, SCIENCE-PRESS


Тел.: +7 (495) 625-9241

 

Influence of the stimulus form on the mechanotactile system resolution

DOI 10.18127/j15604136-201906-02

Keywords:

V.Yu. Bukin – Master Student, Department “Medical and Technical Information Technology” (BMT-2), Bauman Moscow State Technical University
E-mail: vladislav_bukin@mail.ru
A.A. Dogadov – Ph.D. Degree in Human Movement and Rehabilitation Sciences, Grenoble Alps University (France),
E-mail: anton.dogadov@grenoble-inp.fr
M.E. Emelin – Master Student, Bauman Moscow State University; RWTH Aachen University
E-mail: maksemelin@yandex.ru
A.N. Briko – Assistant, Department “Medical and Technical Information Technology” (BMT-2), Bauman Moscow State Technical University
E-mail: briko@bmstu.ru
S.I. Shchukin – Dr. Sc., Professor, Head of Department “Medical and technical information technology” (BMT-2), Bauman Moscow State Technical University
E-mail: schookin@mx.bmstu.ru


Mechanotactile stimulation is a promising technique, which may implemented in hand prostheses to provide a user feedback. To ensure an adequate feedback perception by a user, an attention must be paid to a choice of a stimulus form used for mechanotactile stimulation.
The aim of the work was to study the influence of the stimulus form on user perception. Two experiments were carried on seven healthy volunteers. During both experiments, to type of stimuli were compared: a cylindrical tip and a hemispherical one. In the first experiment, the stimulus, which was initially out of contact with the subject's skin, was slowly moving towards the subject's forearm, fixed in a setup. The subject was asked to push a button as soon as he notice the touch. At the moment when the subject pushed a button, the stimulus displacement with reference to the skin surface and the forearm reaction force were measured. In the second experiment, the stimulus, which was initially immobile in contact with the skin, stared slowly pressing the forearm. The subject was asked to push a button as soon as he notice the stimulus displacement. The stimulus displacement with reference to initial position and the forearm reaction force were measured.
In first experiment, it was shown that cylindrical stimulus requires 2.42 higher force and 1.72 higher displacement to be noticed by a subject. Moreover, the data from one subject had a smaller variance for a hemispherical stimulus. In the second experiment, it was shown that cylindrical stimulus requires 1.2 higher force to create a displacement, detectable by a subject, than a hemispherical one.
This study demonstrates that the shape of the stimulus can affect the dynamic range of the mechanotactile feedback. It was shown that the hemispherical stimulus can be detectable by subjects for smaller displacement; therefore, it provides higher resolution and wider dynamic range. The results of this study can be applied to design mechanotactile feedback in prostheses.

References:
  1. Panarese A., Edin B.B., Vecchi F., Carrozza M.C., Johansson R.S. Humans can integrate force feedback to toes in their sensorimotor control of a robotic hand // IEEE Trans. Neural Syst. Rehabil. Eng. 2009. № 17(6). P 560–567.
  2. Sensinger J.W., Schultz A.E., Kuiken T.A. Examination of force discrimination in human upper limb amputees with reinnervated limb sensation following peripheral nerve transfer // IEEE Trans. Neural Syst. Rehabil. Eng. 2009. № 17(5). P 438–444.
  3. Antfolk C., Cipriani C., Carrozza M.C. et al. Transfer of tactile input from an artificial hand to the forearm: experiments in amputees and able-bodied volunteers // Disabil. Rehabil. Assist. Technol. 2013. May. № 8(3). P 249–254.
  4. Katherine R.S., Michael R.D., Jonathon S.S., Jason P.C., Jacqueline S.H. Design and Integration of an Inexpensive Wearable Mechanotactile Feedback System for Myoelectric Prostheses // IEEE Journal of Translational Engineering in Health and Medicine. 2018 (September). № 10.
  5. Armiger R.S., Tenore F.V., Katyal K.D., Johannes M.S., Makhlin A., Natter M.L., Colgate J.E., Bensmaia S.J., Vogelstein R.J. Enabling Closed-Loop Control of the Modular Prosthetic Limb Through Haptic Feedback // Johns Hopkins APL Technical Digest. 2013. V. 31. Nomber 4. P 345–353.
  6. Kim K., Colgate J.E., Santos-Munne J.J., Makhlin A., Peshkin M.A. On the Design of Miniature Haptic Devices for Upper Extremity Prosthetics // IEEE/ASME Transactions On Mechatronics. 2010. V. 15. № 1. FEBRUARY 2010. P. 27–39.
June 24, 2020
May 29, 2020

© Издательство «РАДИОТЕХНИКА», 2004-2017            Тел.: (495) 625-9241                   Designed by [SWAP]Studio