J reconstr Microsurg
DOI: 10.1055/s-0037-1606539
Original Article
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

The Effect of Split Nerve on Electromyography Signal Pattern in a Rat Model

Maria Florencia Deslivia1, 2, *, Hyun-Joo Lee3, *, Rizki Fajar Zulkarnain4, Bin Zhu4, Arnold Adikrishna4, In-ho Jeon4, Keehoon Kim2
  • 1Department of HCI and Robotics, University of Science and Technology, Daejeon, Korea
  • 2Korea Institute of Science and Technology, Seoul, Korea
  • 3Department of Orthopedic Surgery, Kyungpook National University Hospital, Daegu, Korea
  • 4Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan, Seoul, Korea
Further Information

Publication History

13 May 2017

31 July 2017

Publication Date:
26 September 2017 (eFirst)

Abstract

Background Recent developments of prosthetic arm are based on the use of electromyography (EMG) signals. To provide improvements, such as coordinated movement of multiple joints and greater control intuitiveness, higher variability of EMG signals is needed. By splitting a nerve lengthwise, connecting each half to new target muscles, and employing a program to assign each biosignal pattern to a specific movement, we hope to enrich the number of biosignal sites on amputees' stump.

Methods We split the gastrocnemius muscle of 12 Sprague-Dawley rats into two muscle heads, searched for the peroneal nerve, divided them lengthwise, and connected one half of the nerve to the tibial nerve innervating both muscle heads (SN_50, n = 8). In another group, we connected the undivided peroneal nerve to the nerve of a single muscle head (non-SN_100, n = 6), while the other muscle head received different innervation (non-SN_0, n = 6). After 10 weeks, we stimulated the peroneal nerve and measured the EMG amplitude.

Results Mean EMG amplitude of the muscle head innervated by one half of the nerve (SN_50; 1.77 [range: 0.71–3.24] mV) and by the undivided nerve (non-SN_100; 3.45 mV [range: 1.13–5.34]) was not significantly different. However, the mean EMG amplitude produced by SN_50 was significantly different from that of the other innervation (i.e., non-SN_0; 0.76 mV [range: 0.41–1.35]), indicating the presence of noise.

Conclusion Split nerve in combination with split-muscle procedure can yield a meaningful EMG signal that might be used to convey the intention of living organism to a machine.

* These authors contributed equally to this article.