Table 2.

Counts per hour of compressive strain events below and above the level of 150 με and masseter-muscle bursts below and above the mV level causing a compressive principal strain of 150 με. Only strain events with amplitudes > 30 με and muscle bursts above the 5% activity level are included in the counts (see Materials and methods section). In individual 3, no distinction could be made in the masseter bursts as there were not enough large strain events to measure the masseter burst level causing a compressive principal strain of 150 με (see Table 1). με, microstrain, mV, millivolt

Individual	Events per hour ≤ 150 με	Bursts per hour ≤ mV150 με	Bursts/events	Events per hour > 150 με	Bursts per hour > mV150 με	Bursts/events
1	1462	1440	1.0	213	277	1.3
2	981	496	0.5	130	257	2.0
3	159	–	–	4	–	–
4	512	757	1.5	103	207	2.0
5	586	1117	1.9	254	541	2.1
6	322	3094	9.6	8	81	10.1
7	769	4771	6.2	6	8	1.3
8	665	656	1.0	22	41	1.9
Mean ± SD			3.1 ± 3.5			3.0 ± 3.2