TABLE 2. Normalized RMS means (±standard deviation) during isometric contraction for the 4 evaluated groups.

	LM	LT	RM	RT
Asymptomatic	0.61±0.19	0.55±0.23	0.56±0.28	0.54±0.21
Arthrogenic	0.63±0.20	0.73±0.21	0.71±0.19	0.75±0.23
Myogenic	0.62±0.26	0.75±0.13	0.73±0.23	0.77±0.18
Mixed	0.53±0.28	0.56±0.26	0.47±0.28	0.57±0.27

LM = Left Masseter; LT = Left Temporal; RM = Right Masseter; RT = Right Temporal.