Electromyographic features and efficacy of orofacial myofunctional treatment for skeletal anterior open bite in adolescents: an exploratory study

Table 4 Factor loading of EMGA by varimax rotation

Measurement	Factor 1	Factor 2	Factor 3	Factor 4	Factor 5	Factor6
TA1	0.306	0.158	0.759	0.301	0.145	− 0.118
MM1	0.257	0.776	− 0.013	− 0.079	0.283	− 0.120
DA1	− 0.229	0.534	0.174	0.170	0.242	− 0.433
UO1	0.170	0.401	0.236	0.137	0.072	− 0.475
ME1	0.553	0.175	0.027	− 0.169	0.675	− 0.099
TA2	− 0.854	0.076	− 0.079	− 0.020	0.154	0.346
MM2	− 0.797	0.095	− 0.194	− 0.154	− 0.151	0.352
DA2	− 0.808	0.133	0.048	− 0.050	0.153	0.113
UO2	− 0.101	− 0.030	0.036	0.082	0.085	0.799
ME2	− 0.093	− 0.060	− 0.020	0.041	0.906	0.073
TA3	0.116	0.150	0.864	0.124	− 0.091	− 0.030
MM3	0.062	0.813	0.111	− 0.056	− 0.197	− 0.029
DA3	0.226	0.556	0.471	0.333	− 0.176	0.201
UO3	0.771	0.215	0.305	0.008	− 0.034	0.144
ME3	0.801	0.300	− 0.015	0.034	0.175	0.067
TA4	0.023	− 0.184	0.201	0.781	0.073	− 0.160
MM4	0.075	0.097	0.164	0.825	− 0.059	0.105
DA4	0.007	0.392	− 0.544	0.592	− 0.084	0.104
UO4	0.829	0.140	0.315	− 0.077	− 0.045	0.087
ME4	0.751	0.260	0.019	0.136	0.296	0.054

TA1, MM1, DA1, UO1, ME1: EMGA of each muscles in resting status, TA2, MM2, DA2, UO2, ME2: EMGA of each muscles in ICP, TA3, MM3, DA3, UO3, ME3: EMGA of each muscles during lip sealing, TA4, MM4, DA4, UO4, ME4: EMGA of each muscle during swallowing
The standardized factor loadings of factor 1 to factor 6 are as follows: 0.55, 0.53, 0.54, 0.59, 0.67, 0.43. Measurements with strong correlation were extracted and displayed in a bold font
TA, temporal muscle; MM, masseter muscle; DA, anterior digastric; UO, upper orbicularis; ME, mentalis muscle

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