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

Table 6

EMG values of the individual muscles with eyes open with and without glasses on.

Muscle group		EO			EOWG
		N	Mean	SD	N	Mean	SD	t.value	value
TMD group	LTA	20	2.83	0.7	20	3.95	0.9	4.393	≤0.001
	RTA	20	2.94	0.8	20	4.78	1	6.426	≤0.001
	LMM	20	2.37	0.8	20	3.12	0.9	2.785	0.008
	RMM	20	2.53	0.6	20	2.41	0.8	0.537	0.595
	LSM	20	2.62	0.7	20	3.66	1.8	2.408	0.021
	RSM	20	2.95	0.7	20	3.57	1.1	2.127	0.040
	LDA	20	2.26	0.6	20	3.11	0.5	4.867	≤0.001
	RDA	20	2.05	0.6	20	3.38	0.9	5.499	≤0.001
Healthy group	LTA	20	1.55	0.5	20	1.71	0.2	1.329	0.192
	RTA	20	1.64	0.3	20	1.58	0.8	0.314	0.755
	LMM	20	1.79	0.4	20	1.58	0.3	1.878	0.068
	RMM	20	1.82	0.5	20	1.51	0.6	1.775	0.084
	LSM	20	1.97	0.9	20	1.85	0.2	0.582	0.564
	RSM	20	1.86	0.5	20	1.92	0.5	0.379	0.706
	LDA	20	1.16	0.4	20	1.16	0.6	0.000	1.000
	RDA	20	1.16	0.2	20	1.17	0.3	0.124	0.902