Table 2 Presenting summary of the results of bioelectrical activity (clenching on dental cotton rollers and maximum mouth opening) of the studied muscles.

Mandibular condition	Muscle	Eyes open		Eyes closed		Statistics	Test result	P value
Mandibular condition	Muscle	M (µV)	SD (µV)	M	SD	Test	Test result	P value
Clenching on dental cotton rollers	TA-R	118.11	63.86	115.61	61.40	z	0.65	0.52
	TA-L	122.15	69.28	121.23	66.02	z	0.46	0.65
	TA-mean	120.13	64.38	118.42	61.49	z	0.52	0.61
	MM-R	159.86	96.11	151.16	90.17	z	1.62	0.11
	MM-L	161.66	91.74	155.44	91.99	z	1.21	0.23
	MM-mean	160.76	90.99	153.30	88.19	z	1.46	0.15
	SCM-R	13.03	9.43	11.89	8.81	z	2.48	0.01 ES = 0.35**
	SCM-L	12.57	7.74	11.99	7.90	z	1.83	0.07
	SCM-mean	12.80	8.32	11.94	8.16	z	2.57	0.01 ES = 0.36**
	DA-R	23.26	14.77	20.92	12.65	z	2.04	0.04* ES = 0.34
	DA-L	23.60	18.24	21.53	18.73	z	2.71	0.01 ES = 45**
	DA-mean	23.43	15.73	21.23	14.91	z	2.73	0.01 ES = 0.45**
Maximum mouth opening	TA-R	8.39	10.15	7.36	6.56	z	1.28	0.20
	TA-L	7.36	7.37	6.89	5.99	z	0.70	0.48
	TA-mean	7.87	8.43	7.13	6.02	z	1.02	0.31
	MM-R	11.90	15.60	11.05	14.38	z	2.17	0.03* ES = 0.32
	MM-L	10.07	10.96	9.40	9.13	z	0.92	0.36
	MM-mean	10.98	13.12	10.22	11.47	z	1.69	0.09
	SCM-R	14.10	16.73	13.64	16.09	z	0.66	0.51
	SCM-L	14.57	21.15	14.61	22.30	z	0.20	0.84
	SCM-mean	14.33	18.67	14.13	18.98	z	0.51	0.61
	DA-R	76.38	44.23	72.62	38.97	z	1.04	0.30
	DA-L	74.58	39.05	74.30	41.36	t	0.10	0.92
	DA-mean	75.48	39.62	73.46	38.50	t	0.73	0.47

Significant values are in bold.
TA the front part of the temporalis muscle, MM the superficial part of the masseter muscle, SCM the middle part of the sternocleidomastoid muscle, DA the anterior belly of the digastric muscle, R right site, L left site.
Significant difference: *p ≤ 0.05, **p ≤ 0.01, ***p ≤ 0.001.

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