**Author details**

Juhani Partanen1 \*, Urho Sompa2 and Miguel Muñoz-Ruiz<sup>2</sup>

1 Department of Clinical Neurophysiology, University Central Hospital of Helsinki, Jorvi Hospital, Rörstrandinkatu 4 B 27, 00560, Helsinki, Finland

2 Department of Clinical Neurophysiology, Central Finland Health Care District, Keskussairaalantie 19, PL 123, 40620, Jyväskylä, Finland

\*Address all correspondence to: junipartanen@gmail.com

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
