Standard Correction of Vision Worsens EMG Activity of Pericranial Muscles in Chronic TMD Subjects

Table 2

EMG values for specific muscles in the TMD and healthy subjects with eyes open (EO) versus eyes closed (EC).

Muscle group		EC			EO
		N	Mean	SD	N	Mean	SD	t value	p value
TMD group	LTA	20	2.65	0.5	20	2.83	0.7	0.936	0.355
	RTA	20	2.78	0.8	20	2.94	0.8	0.632	0.531
	LMM	20	2.02	0.6	20	2.37	0.8	1.565	0.126
	RMM	20	2.21	0.5	20	2.53	0.6	1.832	0.075
	LSM	20	2.36	0.8	20	2.62	0.7	1.094	0.281
	RSM	20	2.87	0.6	20	2.95	0.7	0.388	0.700
	LDA	20	2.01	0.5	20	2.26	0.6	1.431	0.160
	RDA	20	1.98	0.4	20	2.05	0.6	0.434	0.667
Healthy group	LTA	20	1.54	0.5	20	1.55	0.5	0.063	0.950
	RTA	20	1.63	0.4	20	1.64	0.3	0.089	0.929
	LMM	20	1.78	0.4	20	1.79	0.4	0.079	0.937
	RMM	20	1.81	0.6	20	1.82	0.5	0.057	0.955
	LSM	20	1.95	0.8	20	1.97	0.9	0.074	0.941
	RSM	20	1.85	0.3	20	1.86	0.5	0.077	0.939
	LDA	20	1.13	0.3	20	1.16	0.4	0.268	0.790
	RDA	20	1.15	0.2	20	1.16	0.2	0.158	0.875