TABLE 6.
Thresholds for scoring EMG events
| Outcome | n | First author& year | |
|---|---|---|---|
| % MVC | 3%, 10% and 20% MVC | 1 | Baad‐Hansen 2007 |
| 5% MVC | 1 | Čadová 2014 | |
| 10% MVC | 11 | Camara‐Souza 2018, Castroflorio 2014 & 2015, Deregibus 2014, Harada 2006, Manfredini 2011 & 2018, Matsumoto 2015, Miyawaki 2003 & 2004, Ohlmann 2018 | |
| 10% MVC (selected amongst 3%, 10% and 20% MVC) | 1 | Ikeda 1996 | |
| 10% and 20% MVC | 3 | Lee 2010, Matsuda 2016, Takaoka 2017 | |
| 20% MVC | 7 | Baba 2005, Jonsgar 2015, Kato 2018, Ono 2008, Saito‐Murakami 2020, Thymi 2020, Yamaguchi 2018 | |
| 20% of 60% MVC | 6 | Conti 2014, Raphael 2013, Schmitter 2015, Stuginski‐Barbosa 2015, Yachida 2012, Zhou 2016 | |
| 20% & 50% MVC | 1 | Haketa 2003 | |
| 30% MVC | 11 | Ahlberg 2008, Carvalho‐Bortoletto 2016, Castro Mattia 2018, Karakouliaki 2015, Mainieri 2012, Minakuchi 2014, Murakami 2014, Nagamatsu‐Sakaguchi 2017, Palinkas 2019, Saueressig 2010, Shochat 2007 | |
| Multiplication of background activity | > 2x baseline EMG activity during resting | 1 | Matsuda 2016 |
| 2× baseline activity | 1 | Yamaguchi 2012 | |
| 2× baseline noise level during resting conditions of the mandible at the beginning of the recording | 1 | Mude 2017 | |
| >3× amplitude of background noise | 1 | Thymi 2019 | |
| >3× resting state standard deviations | 1 | Mizumori 2013 | |
| 4× standard deviation of background EMG activity while awake | 1 | Wei 2017 | |
| >2× baseline amplitude, and amongst those 5%, 10% and 20% MVC | 1 | Maeda 2019 | |
| Other thresholds | 1 μV | 1 | Mohamed 1997 |
| 10 μV | 2 | Shedden Mora 2012 & 2013 | |
| 20 μV | 3 | Rugh 1981, 1984 & 1989 | |
| 100 μV | 1 | Clark 1981 | |
| 20% of highest occurring bursts | 1 | Gallo 1997 | |
| 5–9, 10–24, 25–49, 50–79 and ≥80% of 20 N force in each 128‐ms time‐window | 1 | Iwasaki 2015 | |
| 4 magnitude thresholds (10%, 25%, 50% and 20% of 20 N bite force) and 6 duration points (1, 2, 5, 10, 15 and 20 s) | 1 | Khawaja 2015 | |
| Maximum amplitude of the signals of the stimulated artefacts | 1 | Gallo 1999 | |
| Average RMS of muscle activity during three swallowing movements | 1 | Manfredini 2011 | |
| Whenever the fourth least significant bit of the analogue‐to‐digital convertor was active, a bruxing episode was occurring | 1 | Stock 1983 | |
| 0.625 Hz peak frequency and 2% relative power | 1 | Po 2013 | |
| Not applicable | Signal recognition algorithm | 3 | Jadidi 2008 & 2013, Takaoka 2017 |
| Integrated EMG values of each analysed period | 1 | Abekura 2008 | |
| Refers to other publication | 3 | Manfredini 2016, Nitschke 2011, Shimada 2019 | |
| Not described | 10 | Clarke 1984 & 1984, Hammoudi 2019, Kardachi 1977, Minakuchi 2012 & 2016, Needham 2013, Ohlman 2020, Sakagami 2002, Suganuma 2007 |
Abbreviations: MVC, maximum voluntary contraction; n, number of studies; RMS, root mean square.